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    ECT14 Posts: 1, Reputation: 1
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    #1

    Jun 11, 2009, 01:56 PM
    How to calculate the center and radius of a circle
    Given the equation of a circle (x+5)^2 + (y-3)^2 = 49 find the center and radius. How would I calculate this problem?
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    Perito Posts: 3,139, Reputation: 150
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    #2

    Jun 11, 2009, 02:20 PM
    Quote Originally Posted by ECT14 View Post
    Given the equation of a circle (x+5)^2 + (y-3)^2 = 49 find the center and radius. How would I calculate this problem?
    The equation for a circle is



    where a and b are the x and y coordinates of the center (a,b).

    In your case



    by inspection, the center is at (-5, 3). The radius is
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