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How to find the area of a circle with the diameter 21​
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How to find the area of a circle with the diameter 21​

User Eduardo Romero
by
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1 Answer

4 votes

Answer:

A ≈ 346.36

Explanation:

To find the answer, you must use the formula, A=πr²

Since only the diameter was provided, you need to divide it by 2 to find the radius. 21 divided by 2 equals 10.5, so that will be your radius.

Another formula that can be used while using only the diameter would be A= 1/4 π d²

User DrGenius
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