WEBVTT

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Here is the problem: Find the area of a circle with radius 3.

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Circle with radius 3; area A equals pir squared.

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Read the problem. Radius r equals 3.

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Area. A equals pir squared equals pi times 3 squared equals 9pi approximately 28.27433388.

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So the answer is Area equals 9pi approximately 28.27433388 square units.

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Circle with radius 3; area A equals pir squared.

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the square root of A/pi equals 3, which checks out.