Question

What is  the surface area of a square prism with a side measure of 15

Answer 1

L x W = Area it is SQUARE prism
15 x 15 = 225²
225 x 6 = 1350
1350 is the Surface Area :)

Answer 2

1,350 <--- answer

to find the area of the surface of one side, you would do length times width.
length is 15
width is 15
15 x 15 is 225
since there are 6 sides, you multiply that by 6
225x6 is 1350 which is the answer