Question

A triangular pyramid has a base shaped like an equilateral triangle. The legs of the equilateral triangle are all 6 yards long, and the height of the equilateral triangle is 5.2 yards. The pyramid's slant height is 7 yards. What is its surface area?

Answer 1

78.6 sq. yards

Explanation:

SA = (½×6×5.2)+(3×½×6×7)

= 15.6 + 63 = 78.6 sq. yards