Question

The circumference of a circle is 2pi feet. What is the area?

Answer 1

We have that the circumference of a circle is given by the formula:

`C=2\pi r`

Since we have that C = 2 * pi, then we have that r = 1.

Then, the area for the circle is given by the formula:

`A=\pi\cdot r^2\Rightarrow A=\pi\cdot(1)^2\Rightarrow A=\pi\cdot1\Rightarrow A=\pi ft^2`

Then, the area of this circle is pi square feet.

The area of the circle is:

`A=\pi`