Question

What is the surface area of a square pyramid with a base side length of $9cm$ and a slant height of $7cm$?

Answer 1

Hint:

Step:Find the surface area of a square pyramid .

Given,base side length of $9cm$ and a slant height of $7cm$

The surface area of the square pyramid = Area of base $+$ area of lateral surface

Area of base is square, and Area of lateral surface is triangle.

The surface area of the square pyramid $=9\times 9+4\times \frac{1}{2}\times 9\times 7$

The surface area of the square pyramid $=(81+126)c{m}^2=207c{m}^2$

Hence,the surface area of the square pyramid is $207c{m}^2$