Step-by-step explanation:
First, we must know the formula to finding the area.
[tex]A=r^2\pi[/tex]
Now rearrange the formula so that you can find the radius.
[tex]r=\sqrt{\frac{A}{\pi } }[/tex]
[tex]r=\sqrt{\frac{5}{\pi } }[/tex]
[tex]r=\sqrt{1.6}[/tex]
So, the radius of a circle that has an area of 5 cm² is about 1.3 cm.
