## Algebra: A Combined Approach (4th Edition)

Area of circle is $A =πr^2$ where r is the radius. It is given the Area (A) of the circle is $36π$ square inches. $36π= πr^2$ Step-1: Divide both sides by $π$ $\frac{36π}{π}=r^2$ $36=r^2$ Step-2: Use the square root property $±\sqrt36=r$ $±6=r$ Since radius of a circle cannot be negative, radius is 6 inches.