Question

The circumference of a circle can be represented by the equation C= 2πr. Rewrite

this equation to represent the value of r in terms of C and π. Use your new equation to find the radius of a circle that has a circumference of 54 inches. Leave your answer in terms of pi and solve algebraically

Answer 1

see explanation

Explanation:

C = 2πr ( r is the radius )

isolate r by dividing both sides by 2π )

`(C)/(2\pi )` = r

given C = 54 , then

r =
`(C)/(2\pi )` =
`(54)/(2\pi )` =
`(27)/(\pi )` inches