Each base of a triangular prism is a right triangle with side lengths 3 inches, 4 inches, and 5 inches. The height of the prism is 20 inches. What is the surface area of the prism?

252 inches

Step-by-step explanation:

Step 1:finding the area of triangle

b*h*1/2=3*4*1/2 but since there are two right angles in a triangular prism because of the two sides then its just 3*4 which is 12.

Step 2:finding the perimeter of the right angle

so 3,4 and 5 are known to be part of the right angle sp that means 3+4+5=12

Step 3:multiplying the height and perimeter of the triangular prism

20*12=240

Step 4; (A. K. A the final step) Adding the remaining numbers together.

240+12=252 inches