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21 February, 15:30

Whats the area of a circle with a circumference of 31.4unit

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  1. 21 February, 15:52
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    78.54

    Step-by-step explanation:

    first you have to divided 31.4 by 3.14 to get your diameter so you can get your radius. 31.4 divided by 3.14 equals 10 and 10 divided by 2 equals 5 which is you radius. The formula for area for a circle is πr². 5 squared is 25 and 3.14 times 25 equals 78.54 which is your answer.
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