Question

What is the radius of circle if the area is 22 square meters

Answer 1

Start with recognizing that area of the circle is the math concept involved here and check what we know.
A of circle= pi• r^2
22=3.14•r^2
Square root (22/3.14)=r
Solve to find the radius “r”

Answer 2

The formula of the area of a circle with radius r:

`A_O=\pi r^2`
We have

`A_O=22\ m^2`
Substitute:

`\pi r^2=22\ \ \ |:\pi\\\\r^2=(22)/(\pi)\to r=\sqrt{(22)/(\pi)}\ m`
If you want an approximation, then:

`\pi\approx(22)/(7)\to r=\sqrt{(22)/((22)/(7))}=\sqrt{22\cdot(7)/(22)}=\sqrt7\ m\approx2.65\ m`