Question

What is the circumference of a circle with an area of 530.93m^2?

Answer 1

We know that the area of a circle is:

`A=\pi r^2`

If pi is equal to 3.14 then we can find the radius of the circle so:

`\begin{gathered} 530.93=3.14r^2 \\ (530.93)/(3.14)=r^2 \\ 169=r^2 \\ \sqrt[]{169}=r \\ 13=r \end{gathered}`

now with the radus wwe can calculate the circunference so:

`\begin{gathered} C=2\pi r \\ C=2\cdot3.14\cdot13 \\ C=81.68 \end{gathered}`