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| Math Central | Quandaries & Queries |
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Question from Heather, a parent: We need the formula for area of half circle please explain where each number comes from. Thank you Heather |
Hi Heather,
The area if a circle is given by π r2 where π is approximately 3.1416 and r is the radius of the circle. The arrea of half a circle will be half of π r2 .
Penny
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