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17 September, 23:26

The area of a circle is 826 centimeters. Find the diameter.

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  1. 18 September, 01:00
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    The formula for area of a circle = PI x r^2

    since we know area, we can put that in the formula and solve for r (which is the radius) diameter is radius x 2

    826 = 3.14 x r^2

    divide both sides by 3.14:

    r^2 = 826 / 3.14

    r^2 = 263.06

    r = square root (263.06)

    r = 16.22 cm

    diameter = 16.22 * 2 = 32.44 cm
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