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That depends what you mean with "a 20 cm. circle". If 20 cm. is the radius, you already have the answer. If 20 cm. is the diameter, the radius is half the diameter. (10cm)

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โˆ™ 2009-11-16 22:01:45
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A polynomial of degree zero is a constant term

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Q: What is the radius of a 20cm circle?
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