**Volume of a Sphere**

**Volume of a Cone**

**Volume of a pyramid**

** **

Questions

1. Do you enjoy learning this way? or would you prefer to hear the teacher's voice? Explain your choice.

2. Explain in your own words how (i) the volume of a cone is related to the volume of a cylinder. (ii) the volume of a pyramid is related to the volume of a rectangular prism. (iii) the volume of a sphere is related to the volume of a cylinder.

3. Does watching the video convince you about the formula for volume of a cone, pyramid and sphere? Explain why and how.

4. Does watching the video help you recall the formula for volume of a cone, pyramid and sphere better? Explain why and how.

5. State the formula of the volume of a (i) cone, (ii) pyramid and (iii) sphere.

6** How is the volume of the cone related to the volume of the sphere if the cone has the same height as the diameter of the sphere?

Post your comments and remember to leave your name and class. Please remember to use proper English in your comments.

1)I would prefer to listen to the teacher's voice because some people understand through listening to the teacher and the video has no sound, and thus people only can learn visually.

ReplyDelete2)(i)The volume of the cone is 1/3 the volume of the cylinder.

(ii)The volume of the pyramid is 1/3 the volume of the rectangular prism.

(iii)The volume of the sphere is 2/3 the volume of the cylinder.

3)Yes, because it uses experiments to prove the formulas.

4)Yes, because we can remember the experiments and the results shown to remember the formulas.

5)(i)Vol of cone= 1/3 x Pi x r^2

(ii)Vol of pyramid= 1/3 x Base Area x Height

(iii)Vol of sphere= 2/3 x Pi x r^2

6)The volume of the sphere is 2x more the volume of the cone.

Tan Lin Er

2E3

Questions

ReplyDelete1. Do you enjoy learning this way? or would you prefer to hear the teacher's voice? Explain your choice.

I prefer to hear the teacher's voice with explanation. The music is very irritating.

2. Explain in your own words how (1) the volume of a cone is related to the volume of a cylinder. (2) the volume of a pyramid is related to the volume of a rectangular prism. (3) the volume of a sphere is related to the volume of a cylinder.

(1) 3 X (The volume of a cone) = The volume of a cylinder

(2) 3 X (The volume of a pyramid) = The volume of a rectangular prism

(3) 1.5 X (The volume of a sphere) = The volume of a cylinder

3. Does watching the video convince you about the formula for volume of a cone, pyramid and sphere? Explain why and how.

Yes. It is easy to understand by experience.

4. Does watching the video help you recall the formula for volume of a cone, pyramid and sphere better? Explain why and how.

Yes. Can understand easily with video.

5. State the formula of the volume of a (1) cone, (2) pyramid and (3) sphere.

(1) Volume of a cone = 1/3 X pi X r2 X h

(2) Volume of a pyramid = 1/3 X base area X h

(3) Volume of a sphere = 4/3 X pi X r3

6** How is the volume of the cone related to the volume of the sphere if the cone has the same height as the diameter of the sphere?

The volume of the cone = 1/3 of the cylinder

The volume of the shpere = 2/3 ot the cylinder

=> 2 X (The volume of the cone) = The volume of the sphere

> > > Kim Hae Youn_2E3_07 < < <

1) yes i prefer this way .This way is a faster way to let us learn Maths and we can see the movie clips for many time if we do not understand and move to the part which we do not understand the most.When the teacher is not here , we also can learn by coming to this website eventhought the teacher is not here.

ReplyDelete2)i)The cone volume is 1/3 of the clyinder

ii)The volume of the pyramid is 1/3 of the volume rectangular prism

iii)The volume of the sphere is half of the the volume of a cylinder

3)Yes. the volume of eveything is exactly all same as to half the really half

4)yes. All the formula got all primary skills in it

5)ione=1/3pir*h

ii)pyramid=1/3 x base area x height

iii)sphere=4/3pir²

6)The volume of the cone is 2/3 of the sphere

1)I prefer to listen to teacher's voice as i will be learn more things faster , in the computer lab , the computer loads the video very slowly, thus wasting time.

ReplyDelete2)

(i)The cone is one third the volume of the cylinder.

(ii)The volume of the pyramid is one third the voloume of the rectangular prism.

(iii)The volume of the sphere fills two third of the cylinder.

3) Yes. They demonstrated exactly to prove whether the volume of the pyramid , cone and sphere is that formula or others.

4) Yes. They explained everything very clearly.

5)(i) Formula of cone: one third pi r square

(ii) Formula of pyramid:one third X base area X height

(iii)Formula of sphere: two third pi r square

6)The volume of the sphere is two third the volume of the cone.

Tan Si Ying(2E3)

1. I would prefer learning this way because if the teacher teachs, he might go into other topic and disrupt the lesson, hence we will not be able to learn more whereas if we learn from this way, we can learn and do homework at anytime we want since the teacher cannot be by our side all the times and we cannot shoot questions at him while we can replay the teaching video again and again.

ReplyDelete2. (i)The cone is 1/3 of the cylinder.

(ii)The volume of the pyramid is 1/3 of the

volume rectangular prism.

(iii)The volume of the sphere is half the

volume of a cylinder.

3.Yes. It proves the formulas by doing the experiment like pouring in water, showing that the amount of water fills up the shape.

4.Yes. I can recall how the water is poured into the different shapes like pyramid.

5.Cone=1/3pir²h

Pyramid=1/3 x base area x height

Sphere=4/3pir³

6.The volume of cone is 2/3 of the sphere.

Vincent Lim Tian Wee 2E3

Limuxin 2e3

ReplyDeleteBackground Music Rocks!!!so i like it!The volume of the cone is 1/3of the cylinder.The pyramid is 1/3 of the rectangular prism.The volume of the sphere is 2/3 of the cylinder.3.yes,it teach accurately about the volume.4.Yes i will remember it hardly.5.(cone)1/3piR2(pyramid)1/3of the square(sphere)2/3of the square.6.The sphere is twice the cone

1)I prefer to watch the video rather than teacher teaching in class.

ReplyDelete2i)The volume of a cone is 1/3 the volume of a cylinder.

ii)The volume of a pyramid is 1/3 the volume of a rectangular prism.

iii)The volume of a sphere is 2/3 the volume of a cylinder.

3)Yes, by watching the video i am more convinced rather than teacher just teaching us the formula without any experiments.

4)Yes, by watching the video i can remember easier as i am a visual person.

5i)The formula of a cone is 1/3pir^2h.

ii)The formula of a pyramid is 1/3xBase areaxHeight

iii)The formula of a sphere is 4pir^2.

6)The volume of a cone is 1/2 the volume of the sphere.

Bernice Lim 2E3

1) i prefer teacher explaining as it is cooler and fun... (: partly because it takes a long time to laod and wait to view the video... =(

ReplyDelete2)i) the volume of the cone is one-third to the volume of the cylinder. =>

2)ii) the volume of the pyramid is one-third to the volume of the cylinder. =)

2)iii) the volume of the sphere is two-third to the volume of the cylinder. :)

3) Yes. the video will remind me of the proportions of the cone, sphere and the pyramid to the volume of the cylinder. ^^

4) Watching the videos will make me remind of the ratios and the image of the volume of the cone, pyramid and sphere as videos will attract my attention... ><"

5)i) volume of a cone = (1/3)x(pi)x(r^2)x(h)

5)ii) volume of the pyramid = (1/3)x(r^2)x(h)

5)iii) volume of the sphere = (2/3)x(pi)x(r^2)x(h)

6) the cone has the same height diameter and radius of the sphere and the volume of the sphere is one-third more than the volume of the cone.

Jinny Chan, 2E3

1.Hearing the teacher's voice is better.I can understand better when the teacher explains it by himself.

ReplyDelete2.(i)The volume of the cylinder is three times the volume of the cone.(ii)The volume of the rectangular prism is three times the volume of the pyramid.(iii)A sphere fully filled with water can fill up two-third of a cylinder.

3.Yes,they proved the formula clearly.

4.Yes,they explained everything very clearly.

5.(i)one-third pi r square

(ii)one-third x base area x height

(iii)two-third pi r square

6.The volume of the sphere is two-third the volume of the cone.

Charmaine yeap(2E3)

1)I would prefer to listen to the teacher's voice because some people understand through listening to the teacher and the video has no sound, and thus people only can learn visually.

ReplyDelete2)(i)The volume of the cone is 1/3 the volume of the cylinder.

(ii)The volume of the pyramid is 1/3 the volume of the rectangular prism.

(iii)The volume of the sphere is 2/3 the volume of the cylinder.

3)Yes, because it uses experiments to prove the formulas.

4)Yes, because we can remember the experiments and the results shown to remember the formulas.

5)(i)Vol of cone= 1/3 x Pi x r^2 x Height

(ii)Vol of pyramid= 1/3 x Base Area x Height

(iii)Vol of sphere= 4/3 x Pi x r^3

6)The volume of the sphere is 2x more the volume of the cone.

Tan Lin Er

2E3

1.I prefer to hear the teachers voice as it make me more and attentive and it also helps me memorise easier and in this way it is not easy to be not distracted and memorise the fomula.

ReplyDelete2.i)The volume of a cone is 1/3 the volume of the cylinder.ii)The volume of a pyramid is 1/3 the volume of the rectangular prism.iii)The volume of a sphere is 2/3 the volume of the cylinder.

3.Yes,as it shows me what is the propotionate volume of a cone,pyramid and a sphere by pouring he water to another container to show it

4.Yes,as it shows the fomular and also shows us the the fomular is true

5.i)1/3pir^2h

ii)1/3xBase AreaxHeight

iii)4/3pir^2

6.The volume of the sphere is 2/3 the volume of a cylinder and the volume of the cone is 1/3 the volume of the cylinder

Name:Teo Zhi Jie

Class:2E3

1)I do not prefer learning this way.Although It is quite interesting learning this way.On the other hand,it takes alot of time to access into the video which is time consuming.Thus,i will think that with a teacher teaching in front of us is more useful and effective than watching the video in blogs.

ReplyDelete2i)Volume of a cone is 1/3 of the volume of a cylinder.

2ii)Volume of pyramid is 1/3 of the volume of a rectangular prism.

2iii)Volume of the sphere is 1/3 to the volume of the cylinder.

3)Yes.The video shows me the formula clearly.The video shows the formulas by pouring water from a shape beaker to another.

4)Yes.All shapes are shown clearly to make me remember clearly of the formula.

5i)Cone:1/3x pix r^ x height

5ii)Pyramid:1/3 x base area x height

5iii)Sphere:4/3 x pi x rcube

6)The volume is 2 times more than the cone .

TAN DE XUN

2E3 (35)

17/8/2009

1. I enjoy hearing the teacher's voice as I do not understand some parts of the video and have nobody to ask.

ReplyDelete2.(i) The cone can fill 1/3 of the cylinder with same base radius and height.

(ii) The pyramid can fill 1/3 of the rectangular with same length and perpendicular height.

3. Yes. it proves to me about the formula through the pouring of water

4.It lets me remember how the formula is applied.

5.(i) 1/3pir^2h (ii)1/3base area height

(iii) 4/3pir^3

6.The volume of cone is half the volume of sphere.

Andy Ng Bao Long 2E3

<@{=...

ReplyDelete1.yes, you can listen to the music and read the text at your own pace

ReplyDelete2.i)volume of cone is one third of the cylinder with same base radius and height

ii) pyramid can fill one third of the rectangular prism with same length and perpendicular height

iii)volume of sphere is two third of the cylinder with same base area and perpendicular height

3)yes, it proves the formula

4)yes,as it fills the cylinder i can remember the formula

5i)one third pi r square

ii)one third base area times height

iii)four third pi r cube

6)volume of sphere is twice of the cone

Herbert chua 2e3

1) Though i enjoy this form of learning, I would personally prefer to listen to the teacher's voice. Because it will prevent me from falling asleep when the lesson becomes boring. also, when the server is hyper lag, i will be very tempted to surf the net and don't study. if the server is faster, i wouldn't mind having both :)

ReplyDelete2) (i) the volume of the cone is 1/3 the volume of the cylinder

(ii) the volume of the pyramid is 1/3 the volume of the rectangular prism

(iii) the volume of the sphere is 2/3 the volume of the cylinder.

3) yes. Since it can be done, it must be true.

4)no, as my learning through visual is not that effective as im a audio learner.

5) (i) 1/3(pi)r^2h

(ii) 1/3(base area)

(iii) 2/3(pi)r^2h

6) the volume will be twice the volume of the cone.

Chloe Chan

2E3

1)Yes.We can have a better understanding.

ReplyDelete2i)Volume of cone is 1/3 of the cylinder.

ii)Volume of pyramid is 1/3of the rectangular prism.

iii)The volume of sphere is 2/3 of the cylinder.

3)Yes.They show us the steps and cnvince us by doing experiments.

4)Yes.

5)1/3 x pi x r^2 x h

1/3 x Base Area x h

4/3 x pi x r^3

6)The volume of the cone is 2/3 of the sphere.

Name: Ranson Teo Jin Yi

Class: 2E3

1.I enjoy learning this way.I can understand what the video is talking about without the teacher explaining.

ReplyDelete2.(i)The volume of the cone is 1/3 the volume of the cylinder if they have the same base area and same height. (ii)The volume of the pyramid is 1/3 the volume of a rectagular container if they have the same base area and same height. (iii)The volume of a sphere is 2/3 the volume of a cylinder if they have the same base area and same height.

3. Yes.The video showed me what they are trying to say and i can understand and remember the formula better.

4. Yes.

5.volume of cone= 1/3 x pi x r x r x height (ii)Volume of pyramid= 1/3x base area x height and (iii)volume of sphere=2/3 x pi x r r xheight.

6** The volume of the cone is half the volume of the sphere.

Name:Huang Chia Chi Class:2E3

1)I enjoy to learn in this way, where we access the video to learn about maths. Even though it takes a long time to load the video. Listening to teacher's voice would be good for us also. Both are actually fine.

ReplyDelete2)

i) The volume of a cone is related to the volume of a cylinder,

: When we filled up the cone,and pour into the cylinder it filled up only 1/3 of the cylinder.

ii)The volume of a pyramid is related to the volume of a rectangular prism,

: When we filled the pyramid, and pour into the cylinder,it filled up only 1/3 of the cylinder.

iii)The volume of a sphere is related to the volume of a cyclinder,

: When we filled the sphere, and pour into the cylinder, it filled up only 2/3 of the cylinder.

3)Yes, it convince me. The teachers have use the various objects to fill and pour into the cylinder.We just have to interpret the formula from there.

4)Yes, it helps. It remind me of how much the liquid will fill when pour into the cylinder.

5)

i)Cone:

Formula: 1/3*pi*r^2

ii)Pyramind:

Formula: 1/3*pi*r^2

iii)Sphere:

Formula: 2/3*pi*r^2

6)The volume of the sphere will be twice the volume of the cone.

LEE SHU HOOI 2E3

1. i enjoy learning this way but, i still prefer the teacher's teaching as i can ask questions if i am not sure about something. furthurmore, sometimes there may be some problems with the system.

ReplyDelete2.(i)the volume of cone is 1/3 the volume of cylinder.

(ii)

(iii)the volume of sphere is 2/3 the volume of cylinder.

3.yes as it shows me practically about how they get the formula.

4.yes as video shows practically about the formula so it make me recall the formula better.

5.(i)i/3 pi radius^2 height

(ii)1/3(base area)height

(iii)4/3 pi radius^3

6.then, the volume of the cone is 1/2 the volume of sphere.

name:Nabilah

class: 2E3

Cheah Cheng Kyat(19) class:2E3

ReplyDelete1.teacher's voice.To use the computer to study,most people will not undestand.And if the do not understand,the will not be able to ask for help.So a teacher's voice is better than learning on the computer

2i.Both have the same base area and the same height

ii.Both have the same base area.

iii.Both have the same radius really.

3.Not really.It is very hard to understand just by looking at the video

4.Not at all.I do not understand much about the video and prefer to study with the textbook.

5i.1/xpixrxrxh

ii.

iii.4/3xpixr3

6.volume of cone is half the volume of sphere.

1. Hearing teacher's voice. It helps me to focus more and some things cannot be explain through watching a video.

ReplyDelete2. i)The volume of the cone filles 1/3 of the cylinder.

ii)The volume of pyramid filles 1/3 of the rectangular prism.

iii) The volume of the sphere filles 2/3 of the cylinder.

3. Yes. It make use of volume of solids we have learnt.

4. Yes. We are able to recognise the solid better.

5. i) pi x r^2 x height x 1/3

ii) base x height x 1/3

iii) 4/3 pi x r^2

6. The volume of the cone will be teh half of the sphere.

Hungshen 2E3

1) I'd perfer to watch the video. We are able to see it for ourself rather than just listening to the theory

ReplyDelete2)i)The volume of the cone is one-third the volume of a cylinder

ii)The volume of the pyramid is one-third the volume of a cylinder with a square base

iii)The volume of the sphere is two-thirds the volume of a cylinder

3)Yes.We are able to see everything with our eyes which is more convincing than just listening to the teacher

4)Yes. It is easier to recall things that we watch rather than just trying to recall what we have heard

5)i)cone- pir2h

ii)pyramid- 1/3xbase areaxheight

iii)sphere- 4/3xpixr3

6)The volume of the pyramid is 1/2 the volume of the sphere

Ashley Lim 2E3

nazif shafie bin khairul(32)2E3 1.no. teachers voice. it is enjoyable

ReplyDelete2.(i)they have the same base area.(ii)the base area is the same.(iii)they use the same fomula to calculate the cicle.

3.no. it is not specific enough.

4. no. it is not specific. 5.cone=1/3piRsquaredH.pyramid=1/3piRsquaredH. sphere=4piRsquared

6.they use PI

Muhd Khairul Afiq

ReplyDelete2E3

1.)I prefer teacher teaching me because it's easier to understand.

2.)(i.)Their base area are the same.(ii.)They have the same bas area.(iii.)They use the same formula.

3.)No.It's not imformative enough.

4.)A bit.It only explains the formula but not how to do questions.

5.)(i.)Cone=1/3pi x (rxr)(ii.)Pyramid=1/3 x base area x heigt(iii.)Sphere=4 x pi x (rxr)

6.)They use pi.

Aaron Khoo Soo Wei 2E3

ReplyDelete1.This way is also good because students can memorise the video much easier than memorising infomation from the text book. but through the traditional way of teaching any queries could be answered immeadietly

2.(i) The volue of the cone is one-third of the cylinders.

(ii) It is one third that of the rectangular prism

(iii) The volume of the sphere is two thirds of the cylinder

3. Maybe because it helps students who cannot visulise the situation, and allows them to remember the formulars easily

4. Yes it was different and unique.

5.Cone: 1/3 x base area x height

Pyramid: 1/3 x base area x height

Sphere:4/3 x Pi x radius^

6.They all fill up the cylinder in thirds but at different rates and using the cylinder the refer to it is easy

1.No. Iprefer it with the teacher's voice,as we cannot use the computer everyday.

ReplyDelete2.(i)The volume of the cone is 1/3 the volume of the cylinder.

(ii)The volume of the pyramid is 1/3 the volume of the rectangular prism.

(iii)The volume of the sphere is 2/3 the volume of the cylinder.

3.Yes, it has a accurate amount.

4.No, i prefer practising on the questions as i can remember it better.

5.(i)Volume of cone= 1/3 x Pi x r x r

(ii)Volume of pyramid= 1/3 x Base Area x height

(iii)Volume of sphere= 2/3 x Pi x r x r x height.

6.The volume of the sphere is 2/3 the cylinder while the cone has 1/3.

Name: Lim Jia Jin Nico

Class:2E3

Richard Prayoga Supangat - 2e3 (34)

ReplyDelete1.I prefer to hear the teacher's voice.Although we can repeat the video,learning this way will take a lot of time to understand.Learning without somebody explaining will be boring and we can not ask if we have question.It's better if the teacher can do the experiment like those videos in the class, it will be more interesting.

2.(i)Cone has the same base area and height as Cylinder but the volume is only one-third of the cylinder as it takes 3 rounds to fill the water into cylinder with the volume of cone.

(ii)Pyramid has the same base area and height as rectangular prism but the volume is only one-third of the rectangular prism as it takes 3 rounds to fill the water into cylinder with the volume of pyramid.

(iii)Sphere has the same height and base with cylinder but the volume is only 2/3 of the cylinder as when the water is filled into the cylinder, it only filled 2/3 of the volume of cyllinder.

3.Yes it does.The videos showed the us the formula by showing the experiment related to where the formula come from.

4.Yes it does.The videos showed us the similiarity of cone, pyramid and sphere with other 3d objects.By watching the videos we can understand more and remember more about the volume of a cone, pyramid and sphere.

5.(i)1/3 x Pi x r² x h

(ii)1/3 x Base area x Height

(iii)4/3 x Pi x r³

6.Volume of cone = 1/3 of the cylinder

Volume of sphere = 2/3 of the cylinder

that means that the volume of sphere is two times the volume of cone

1/3 x 2 = 2/3

1. I would prefer learning this way. However, the videos take too long to buffer. Other than that, I'm fine with learning online through videos.

ReplyDelete2.

(i) The volume of a cone is one-third the volume of a cylinder.

(ii) The volume of a pyramid is one-third the volume of a rectangular prism.

(iii) The volume of a sphere is two-third the volume of a cylinder.

3. Yes. The video proves the formula.

4. Yes. It's easier to remember the formula through watching videos, rather than just memorising it.

5.

(i) ⅓(pi)r²h

(ii) ⅓ x base area x height

(iii) ⅔(pi)r²h

6. The volume of the cone is two-third the volume of the sphere.

Chia Jia Yu, 2E3.

Answers:

ReplyDelete1. I think that both teaching methods are fine with me.

2. (i)The volume of cone is 3 times lesser than The volume of the cylinder. (Both the cone and the cylinder shares the same diameter)

(ii)The volume of the pyramid is one-third lesser than the voulume of a rectangular prism. (Both shares the same base area)

(iii)The volume of sphere is two-third lesser than the volume of cylinder. (Both shares the same height)

3.Yes, it convince me. I was able to see the experiment instead of illustrating. This way, I can understand the fomula straight away.

4. Yes, i am able to imagine the experiment made by the teachers.

5.(i)Volume of cone = one-third X pie X r^2 X h

(ii) Volume of pyramid = one-third X Base area X Height

(iii)Volume of sphere = (One whole+ one-third) X pie X r^3

6. The volume of the sphere is two-third lesser the volume of the cone.

Name: Henry Lutriyono

Class: 2E3

1)I would prefer the teacher's voice, because I learn more efficiently through listening, but ths website is quie useful when you are on medical leave.

ReplyDelete2)[i] The volume of cone is 1/3 the volme of the cylinder

[ii]The volume of the pyramid is 1/3 the volme of the rectangular cylinder.

[ii] The volume of the sphere is 2/3 the volume of the cylinder.

3)Yes because the teacher has demostrated to us through the experiments.

4)Yes, we can recall the process of the experiments to derive the formula.

5)[i]Volme of cone= 1/3 x pi x r x r x h

[ii]Volme of pyramid= 1/3 x Base Area x height

[iii]Volume of sphere= 2/3x pi x r x r x h

6)The volume of sphere is 2 times more than volume of cone. As the cone is 1/3 of the cylinder and the sphere is 2/3 of the cylinder.

Tan Jia Liang

2E3

Md.Khuzaimah,2E3

ReplyDelete1)Yes.I enjoy because it helps the person who does not understand the topic and the video can be replayed by the user.

2i)The volume of the cone is 1/3 of the volume of the cylinder.

2ii)The volume of the pyramid is 1/3 of the volume of the rectangular prism.

2iii)The volume of the sphere is 2/3 of the volume of the cylinder.

3)Yes.It is because the demonstration of the topic benefit the user that are visual or audio learners.

4)Yes.As the topic is done in secondary 1,it has been a long time. But the video helped me remember.

5)cone=1/3pir*h

ii)pyramid=1/3 x base area x height

iii)sphere=4/3pir²

6)The volume of the cone is 2/3 of the sphere

1.i like when the teacher teach us because i sometimes cannot understand if i self studying but computer also nice because when i write the answer cannot be tired.

ReplyDelete2.i the cone volum is the 1/3 of the volume of the cylinder,in the movie it explain that if we pour a water from cone 3 times it was the simmiliar as the cylinder volume.so volume of the cone is= 1/3 volume of cylinder(if the radius and the height is the same)if the formula of cylinder was= pi x r^2 x h than the volume of cone was= 1/3 pi x r^2 x h x 1/3

ii.the pyramid volum is 1/3 of the volume of the rectangular prism,in the movie show that if we pour a water from pyramid 3 time it was the same volume as the rectangular prism .so the volume of pyramid was= 1/3volum of rectangular prism(if the base area and height)if the formula of rectangular prism was= base area x height than the formula of pyramid was= base area x height x 1/3

iii.the sphere volum is 2/3 of the volume of the cylinder,in the movie show that if we pour a water from pyramid 1 time it fill 2/3 of volume as the cylinder .so the volume of sphere was= 2/3 volum of cylinder(if the radius and height)if the formula of cylinder was= pi x r^2 x height than the formula of sphere was= pi x r^2 x height x 2/3

3.yees by pouring the water intoo the other object it show us that it only a little bit of different than the other volume

4.yes.the video make me recall about the volume of the pyramid,sphere and cone

5.cone= pi x r^2 x height x 1/3

pyramid= base area x height x 1/3

sphere= pi x r ^2 x 2/3

6.it show that the the 2/3 of the cone volmue

is the same as the colume of sphere

kevin

2E3

1)The video is very interesting as the words are shown at speed where they are readable.However,i would prefer hearing the teachers voice as it would be more interactive.

ReplyDelete2)The video helps me understand:

i)That the volume of the cone is 1/3 of a

cylinder.

ii)That the volume of the cone is 1/3 of a

rectangular prism.

iii)That the volume of the sphere is 2/3 of a

cylinder.

3)Yes,it does.It shows the truth and how the fomula applied,works.

4)No.By just memorising would do.

5)volumes:

i)1/3xpixR^2

ii)base areaxheight

iii)4/3xpixR^2

6)The volume of cone is halve of sphere.

1) Yes. It is different from the usual way teachers teach us Maths.

ReplyDelete2i) A cone needs to be filled up 3 times to make a volume of a cylinder.

2ii) A pyramid needs to be filled up 3 times to make the volume of a rectangular prism.

2iii) A sphere needs to be filled 1 1/3 times to make the volume of a cylinder.

3) Yes. It shows us real-life experiments about finding the formula for volume of cone, pyramid and sphere. It uses water for using the volume for finding the formula for volume for cone, pyramid and sphere.

4) Yes. It makes me remember the formula for volume of cone, pyramid and sphere. The experiments are very realistic.

5i) 1/3 x pi x r^2 x h

5ii) 1/3 x base area x height

5iii) 4/3 x pi x r^3

Ong Kenyu 2E3

1)I think thatI prefer that we can hear the teacher's voice and the teacher to be teaching ask in class as if we have any problems, we can ask immediately.

ReplyDelete2)i)The volume of the cone is 1/3 the volume of the cylinder.

2)ii)The volume of the cone is 1/3 the volume of the squared-base cylinder.

2)iii)The volume of the sphere is 2/3 the volume of the cylinder.

3)Yes. The video proved to me and convinced me about the volume of the pyramid,sphere and the cone as the teachers did an experiment to show and convince me.

4)Yes. The video tell me the relationship between the volume of cone, pyramid, and the sphere which help to to remember better.

5)i)1/3 x Pi x r^2 x h

5)ii)1/3 x base area x height

5)iii)2/3 x Pi x r^2 x h

6)The volume of the sphere would 2 times the volume of the cone.

Name: Jasper Leo(24)

Class:2E3

1)I prefer the teacher's voice.It is more clear and effective for us to learn.

ReplyDelete2i)The volume of the cone is 1/3 of the cylinder.

ii}The volume of the pyramid is 1/3 of the rectangular prism.

iii)The volume of the sphere is 2/3 of the cylinder.

3) The cone is filled with water and to see how many times does it require to fill up the cylinder and this method applies to sphere and pyramid.So it makes easier for us to see the volumes cone,sphere and pyramid.

4)Yes,we have learnt the formula of the volume of cylinder and rectangular prism ,so we can work out thwe volume of cone,sphere and pyramid from there.

5)volume of cone=1/3xpixrxrxH

=1/3piRsquareH

volume of sphere=2/3xpixrxrxH

2/3piRsquareH

volume of pyramid=1/3BxLxH

=1/3BLH

6}The volume of the cone is 1/2 the volume of the sphere.

YuShuChun_2E3

1)i would prefer to listen to my teacher's voice. Because the video does not provide adequate explaination. It just shows why cone, sphere and pyramid have a certain formula.

ReplyDelete2i) The volume of the cone is 1/3 of the cylinder.

2ii)The volume of the pyramid is 1/3 of the regtangular prism.

2iii)The volume of the sphere is 2/3 of the cylinder.

3)Yes. It is proven by the experiment that the formula for sphere, cone and pyramid are right.

4)Yes.The formula had been proven in the experiment.

5i)volume of cone= 1/3xpixr^2xh

5ii)volume of pyramid=1/3xbase area

5iii)volume of sphere=2/3xpixr^2xh

6)the volume of the cone is 2/3 of the sphere.

Seng Si Xian 2E3