What is the surface area of this triangular prism? the base of each triangle 42m and the height of the triangular base is 20m. (not a multiple choice question)

The surface area is

Step-by-step explanation:

see the attached figure to better understand the problem

we know that

The surface area of a triangular prism is equal to

where

B is the area of the triangular base

P is the perimeter of the triangular face

H is the height of the prism

Find the area of the base B

Find the perimeter of the base P

we have

substitute the values

The surface area is

it has changed from the width and the height.

step-by-step explanation:

a

step-by-step explanation:

the answer is a