Question

The radius of a circle is 10. Using π, which equation expresses the ratio of the circumference of the circle to the circle's diameter?

Answer 1

`(circumference\ )/(diameter)=\pi`

Explanation:

Given that radius of the circle = 10

Using π, we need to find about which equation expresses the ratio of the circumference of the circle to the circle's diameter.

diameter of the circle = 2(radius) = 2(10)=20

circumference of the circle = 2 π r = 2 π (10) = 20 π

then ratio of the circumference of the circle to the circle's diameter is given by:
`(circumference\ )/(diameter)=(20\pi)/(20)=\pi`.

Hence required equation is
`(circumference\ )/(diameter)=\pi`