Find the total surface area of the net below.
3 m
-2.6 m
9m

Step-by-step explanation:

The picture of the question in the attached figure

Part 1) using a formula

we know that

The surface area of a triangular prism is equal to

where

B is the area of the triangular face

L is the length of the triangular prism

P is the perimeter of the triangular face

Find the area of the triangular face B

Find the perimeter of the triangular face P

we have

substitute

Part 2) Using the net

The surface area is equal to the area of two triangular faces plus the area of three rectangular faces

so

-4

step-by-step explanation:

(-4+8)=-(4-8)=-8+4=-4