geometry

how do you find the circumference of a circle with the area of 169 pie m squared(in the terms of pie)? Please tell me how to do it. Don't just give me the answer

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  1. area = pi r^2
    169 pi = pi r^2
    so
    r^2 = 169
    r = 13
    then
    we want circumference = 2 pi r
    = 2 * 13 * r
    = 26 r

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