Question

Jim is building a model of a square pyramid for a class project. The side length of the square base is 20 inches and the slant height of the pyramid is 13 inches. What is the surface area of the model pyramid?

Answer 1

`SA = 920 inches^(2)`

Explanation:

Given Data:

Slant height of square pyramid = l = 13 inches

Base edge of square pyramid = s = 20 inches

To Find Out:

Surface area of square pyramid = SA = ?

Formula:

`SA = s^(2) + 2 * s * l`

Solution:

`SA = s^(2) + 2 * s * l`

`SA = 20^(2) + 2 * 20 * 13`

`SA = 400 + 520`

`SA = 920 inches^(2)`