Question

The circumference of a circle is 9 m.

What is the area of the circle?
4.5 m2
18 m2
20.25 m2
81 m2

Answer 1

`20.25\pi \: {m}^(2)`

Explanation:

`Circumference = 2\pi r = 9\pi \Rightarrow r = 4.5 \\ Area = {r}^(2)\pi = {4.5}^(2) \pi = 20.25\pi`