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

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) (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.
and you want r.

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