Friday, March 26, 2010

Krystal's Growing Post

RECTANGULAR PRISM
TOP;FRONT;SIDE

Area =LxW Area=
LxW Area=LxW
Area = 5x8 Area=8x8 Area=8x8
Area =40cm2 Area=64cm2 Area=64cm2

TSA= TOP + TOP + FRONT + FRONT + SIDE + SIDE
= 40+40+64+64+64+64
= 208 cm2



























TRIANGULAR PRISM

a = b x h ÷ 2
a = 10 x 12 ÷ 2
a = 60cm²
a = l x w
a = 10 x 4
a = 40cm²

a= l x w
a = 10 x 4
a = 40cm²

a= l x w
a= 10x 12
a = 60cm²

TSA

= (triangle)+(triangle)+(rectangle)+(rectangle)+(rectangle)
= 60+60+60+40+40
= 260cm²













Cylinder
Radius:
r = d ÷ 2
r = 12 ÷ 2
r = 6cm²

Formula:
sa = 2 x (pi x r²) + (pi x d x h)
sa = 2 x 3.14 x 6 x 6 + 3.14 x 6 x 12
sa = 226.08+ 226.08
sa = 452.16 cm²





2 comments:

Kim873 March 26, 2010 at 4:01 PM  

Good Job Krystal!
I liked how you put the formula first for each of them.

hannah873 April 7, 2010 at 5:09 PM  

Hi Krystal. Everything was nicely done. Your nets were really good and accurate. Keep up the good work :)

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