In this video, we are going to look at how to calculate the area of a regular polygon using the apothem.
Let’s label the apothem “a”. The formula to find the area of a regular polygon using the apothem is:
A pentagon has a side length of 3 inches with an apothem measuring at 2.5 inches. Determine the area of the pentagon.
Substitute the values for apothem and perimeter.
The area of the pentagon is 18.75 square inches.