Question

The base of a right triangular pyramid is an equilateral triangle. The base triangle has a base of 6 feet and a height of 5.2 feet. The side triangles have a base of 6 feet and a height of 4 feet. What is the surface area of this triangular pyramid?

Answer 1

1/2(6*6)+3/2(6*4)

2*36 +72/2

144/2 =72