# Chapter 8 - Geometry - 8.6 Circles - 8.6 Exercises - Page 573: 2

To use the formula for finding the area of a circle, you need to know the length of the radius. If you are given the diameter of a circle, what should you do to find the radius. Divide by two.

#### Work Step by Step

Area of a Circle: $A$ = $\pi$$r$$^{2}$ Therefore, to find the area the radius is required. Diameter = 2$r$ Therefore: $r$ = Diameter / 2

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