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Friday, March 9, 2012

Kristan's Surface Area Post

Rectangular Prism

lxw:
5x10= 50m2
10x6= 60m2
5x6= 30m2

TSA= 2(T+F+S)
= 2(50+60+30m2)
= 2(140m2)
= 280m2

Triangular Prism

bxh/2
9x8/2
72/2 = 36x2=72cm

10x5= 50cm
9x5= 45cm
8x5= 40cm

50+45+40= 135cm2
135+72= 207cm2


Cylinder

3.14x8= 25.12mm

d/2= r
8/2= r
4= r

(A)= pie r2
= 3.14x r2
=3.14x42
= 3.14x16
= 50.24mm2

TSA= 50.24+50.24+301.44
= 401.92mm2

1 comments:

rose817 said...

Good job Kristan! I lie that your post is organized. My suggestions are you could put pictures in your post so it won't look plain. Also the 2 in square centimeters should look like an exponent.
Over all Good job!

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