Question

Find the circumference of this circle. Round to the nearest tenth.

Area= 63.6 inches squared

Answer 1

C = 28.048

Explanation:

Circumference = 2pi(r)

Area = pi(r)^2

62.6 = pi(r)^2

r^2 = 62.6/pi

r^2 = 19.926

r = 4.464

Therefore, circumference = 2pi(4.464)

= 28.048

Answer 2

Answer: 28.3 inches

Explanation:

In order to find the circumference of the circle , we need to find the radius of the circle from the area given.

The formula for calculating area of circle is given by :

A =
`\pi r^(2)` , that is

63.6 =
`3.14` x
`r^(2)`

`r^(2) = 63.6 / 3.14`

`r^(2) = 20.25477707`

`r = 4.5`

Therefore : to calculate the circumference of the circle , we will use the formula for calculating the circumference of a circle , which is

C =
`2\pi r`

C =
`2(3.14)(4.5)`

C = 28.26

C≈ 28.3 inches