Answer:
473 in²
Explanation:
We have four congruent triangles and a square in the base.
The formula of an area of a triangle:

b - base
h - height
The formyla of an area of a square:

a - length of side
We have b = 11 in, h = 16 in and a = 11 in. Substitute:

The Surface Area :

Substitute:
