## Wednesday, January 26, 2011

### Ryan's Surface Area Post

Triangular Prism

first you need to find the numbers you need for the formula bxh/2

two triangles
bxh/2
5x7=35/2=17.5
5x7=35/2=17.5

Next is lxw

4x6=24
4x6=24
4x6=24

TSA:17.5+17.5+24+24+24=107

Rectangular Prism

lxw
4x4=16
4x4=16
4x4=16

TSA:16+16+16=48

Volume

r= d/2
r= 8m/2
r= 4m
v= r.r.π.h
v= 4m x 4m x 3.14 x 10
v= 502.4m^3

v= l.w.h
v=10cm x 16cm x 10cm
v= 1600cm3
v=l.w.h
v=5cm x 6cm x 10cmv=300cm3
v= 1600cm3 - 300cm3 = 1 300cm3

1. That is a great post and you did just fine. Don't worry that you don't know tons about prisms because I don't either.:) Next time try adding a link or video though. Keep up the tedious efforts you put into your posts!

2. I agree, with Duyen. What counts is that you at least tried. I have a little tip for when finding the surface area of the 2 triangles in the prism. Just find the bxh of one triangle. I hoped this made things easier for you.

3. Great post Ryan, It's great that you tried so that we knew what you know about rectangular and triangular prism.Also great job explaining how to find the surface of each prisms.

4. Great job Ryan. It's great that you tried instead of not doing it at all. Next time add a link and video to make your post better. Other than that, great job.

5. Good Job! Your bloog wasn't really bad at all!Don't worry I am not that good at prisims either! Maybe add a link next time though.

6. Good job Ryan. I agree with them that at least you tried to answer those questions even though you don't know about the rectangular prisms. Next time, add a video or a link about prisms. Good job.

7. Oh, Good Job Ryan! It was good that tried and put it out there, that just helps you understand more when people try to explain it. I actually have a lot of trouble with triangular prisms, as well. I always thought that all the rectangles were the same size, but I just learned that it is not. I still do it, though. Can't really help it. Good Job, Ryan!! Hope you understand what to do soon!