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10 November, 10:18

The area of a circle is 28.26 square centimeters. What is its diameter (use 3.14 for ð) ?

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  1. 10 November, 10:46
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    Area for circle is πr² so πr² = 28.26 and we can sub 3.14 as pi

    3.14*r²=28.26 we can divide by 3.14 to get r² on it's own

    r²=28.26/3.14

    then we root both sides to get r on it's own

    28.26/3.14=9 √9=3

    and the diameter is double the radius 3*2=6 so the diameter is 6
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