Question

What is the surface area of the prism?

A. 140 in2
B. 144 in2
C. 420 in2
D. 288 in2

Answer 1

you have to find the areas of the triangle faces and rectangular faces, so…
the triangles' areas are:
6 • 16 = 96
the rectangles on the sides have areas of:
10 • 9 • 2 = 180
and the base rectangle has an area of
16 • 9 = 144
the surface area is 96+180+144 which is 420 in2.