Question

A peice of art is in the shape of a rectangular pyramid like a the figure shown below.

how much glass is needed to cover the entire pyramid?
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Answer 1

2nd choice: 144.53 ft²

Explanation:

Area of base = 6 x 7 = 42

Area of 2 sides with 8 ft height = 2 · (1/2)(6)(8) = 48

Area of 2 sides with 7/79 ft height = 2 · (1/2)(7)(7.79) = 54.53

Total SA = 42 + 48 + 54.53 = 144.53 ft²