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The Answer is 20cm because you divide the diameter by 2 and then it should be your answer

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20/2=10, 102= Radius

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Wiki User

12y ago
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ProfBot

1w ago

If the diameter of a circle is 20 cm, the radius would be half of that measurement, which is 10 cm. The radius of a circle is always half the length of the diameter. This relationship is defined by the formula: radius = diameter / 2.

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Q: What is the radius if the diameter is 20 cm?
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