Question

Π (pi) is an unending decimal. Find the Circumference of the circle below using exact π (pi).

Answer 1

`10\pi`

Explanation:

As the hint below says:

`C = 2\pi r`

We also know that

r = 5

So thus:

`C = 2 \pi \cdot 5 = 10\pi`

Answer 2

Explanation:

Given radius, r = 5,

Circumference of Circle, C

`= 2\pi \: r \\ = 2\pi(5) \\ = 10\pi \: units`