The surface area of a triangular pyramid is 305 square inches. The area of the base is 35 square inches. Each face has a base of 9 inches. What is the slant height?
-
First find the surface area of 4 triangle.
So it will be,
Surface area of 4 triangle = 305-35
=270
Area of 1 triangle = 270 / 4
= 67.5
Using (1/2) x b x h to find the slant height
So,
Let h be the slant height.
(1/2) x 9 x h = 67.5
h = 15
:D
So it will be,
Surface area of 4 triangle = 305-35
=270
Area of 1 triangle = 270 / 4
= 67.5
Using (1/2) x b x h to find the slant height
So,
Let h be the slant height.
(1/2) x 9 x h = 67.5
h = 15
:D