A penny has a diameter of 19 millimeters. What is the radius of the penny.

Discussion in 'Calculator Requests' started by math_celebrity, Mar 26, 2020.

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  1. math_celebrity

    math_celebrity Administrator Staff Member

    A penny has a diameter of 19 millimeters. What is the radius of the penny.

    D = 2r

    To solve for r, we divide each side by 2:
    r = D/2

    Plugging in D = 19, we get:
    r = 19/2 or 9.5
     
    math_celebrity, Mar 26, 2020
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