## anonymous 3 years ago A circle has an area of 841π cm2. What is the diameter?

1. anonymous

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?

2. anonymous

Thank you!