Question

How do you find the area of a circle with circumference 45?

Answer 1

I found `161` u.a.

Explanation:

The circumference `C` is given by:
`C=45=2pir`
so that `r=45/(2pi)`
The area will be: `A=pir^2` and using our radius we get:
`A=pi(45^2/(4pi^2))=2025/(4pi)=161` units of area