SOLUTION: A semi circle has an area of 100cm2. Find its radius. So far I have drawn the circle to help out. And: Let r = radius Would this be the correct equation to express the questi

Algebra ->  Equations -> SOLUTION: A semi circle has an area of 100cm2. Find its radius. So far I have drawn the circle to help out. And: Let r = radius Would this be the correct equation to express the questi      Log On


   



Question 810659: A semi circle has an area of 100cm2. Find its radius.
So far I have drawn the circle to help out. And: Let r = radius
Would this be the correct equation to express the question:
(Pie)r2 divided by 2 = 100
Sorry about the words and not proper mathematical signs :)
Thanks and feel free to start over and ignore my working :)

Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
Two of these semicircles together can be arranged to form a whole circle, area 200 square centimeters.
200=pi%2Ar%5E2 and you want r.
highlight%28r=sqrt%28200%2Fpi%29%29