A triangular pyramid has a slant height of 0.75 foot. The equilateral triangular base has a perimeter of 1.2 feet and an area of about 0.07 square foot. Find the approximate surface area.
+129847
Assuming that we're not interested in the area of the base.......
The faces of the pyramid are 3 triangles each having a base of 1.2 / 3 = .4 ft
So......the surface area =
3 * (1/2) (base of each triangle) (slant height of each triangle) =
(3/2) ( .4) (.75) = 0.45 sq ft
