Question

(05.07 MC)

The net of a square pyramid is shown:

What is the surface area of the figure?

0.65 square inch
0.50 square inch
0.40 square inch
0.25 square inch

Answer 1

0.65 square inch

Explanation:

Answer 2

0.65 square inch

Explanation:

Each triangle has an area given by ...

A = 1/2bh = 1/2·(0.5 in)(0.4 in) = 0.10 in²

The square base has an area given by ...

A = s² = (0.5 in)² = 0.25 in²

The total area is that of the square base and 4 triangles:

S = 0.25 in² + 4×0.10 in² = 0.65 in²