Question

Find the surface area of the prism.



A.
24 m2

B.
54 m2

C.
94 m2

D.
104 m2


btw the sides are 3, 4, and 5

Answer 1

What prism is it??

Answer 2

a square

Answer 3

I assume it's a rectangular prism.
You need to add the area of each side.

Answer 4

It's good to sketch a diagram. Picture holding a rectangular blocky eraser in front of you. That way you won't forget to add the area of a top or bottom, or one of it's sides.

Answer 5

so i add

Answer 6

Remember that the area of each rectangular SIDE is LENGTH x WIDTH.
The area of left side is 3 x 4 = 12. There are two sides like that.
The area of the front side is 5 x 3 = 15 and there are two of these sides (one in front and one hidden at the back) .
The area of the bottom is 4 x 5 = 20. There's a bottom and a top so there are two of these.
The total is 12 +12 + 15 + 15 + 20 + 20 = 94 m^2. So that's answer C.

Answer 7

thanks