## UmmmHELP Group Title A circle has an area of 841π cm2. What is the diameter? one year ago one year ago

The formula for the area of a circle is $A = \pi r^2$ so we get $841 \pi = \pi r^2$ pi cancels and you get $841 = r^2$ so$r = \sqrt{841}$ and $d=2r=2\sqrt{841}$ Make sense?