Question

The area of the base (B) of a triangular pyramid is 28 cm. The perimeter (p) is 20 cm, and the slant height (S) is 5 cm. Determine the pyramid's surface area.

Answer 1

78 cm²

Explanation:

SA = BA + p x Sh /2

SA = 28 + 20 x 5 / 2 = 78