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If the area of a circle is 28.6, then the radius is 3.017

Since the area of a circle is determined by the equation A=(pi)r2, you can work backwards. So, 28.6=(pi)r2. Divide both sides by pi (about 3.1415) to get 9.104=r2. Then, take the square root of both sides to find r. r= 3.017

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Q: What is the radius if the area is 28.6?
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