Question

The area of a circle is found by the equation A=πr^2. If the area of a certain circle is 169π square inches, find its radius r

Answer 1

Its radius is 13 in

Hope this helps!

Explanation:

π ×
`r^(2)` = 169π

π × 169 = 169π

π × (
`√(169)`
`)^(2)` = 169π

π ×
`(13 )^(2)` = 169π

r = 13