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20 August, 13:00

A circle is 13cm What is the radius and diameter of the following circle?

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  1. 20 August, 13:12
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    I think you mean the area of the circle is 13 cm, In that case, let's use the formula to solve it!

    d ~ 4.04

    r ~ 2.02.

    Step-by-step explanation:

    Basically since we know the formula is pi (3.14) * r * r = A, we can divide A by 3.14.

    Let's set this up!

    r^2 * 3.14 = 13

    Divide both sides by 3.14

    And we get

    r^2 ~ 4.1

    Now, let's square root both sides and get

    r ~ 2.02.

    since d = r * 2, we can do

    d ~ 2.02 (2)

    d ~ 4.04
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