h and k are just arbitrary letters chosen to represent values in a standard circle equation, Now they are a convention, so everyone usually uses those letters. Circle equation in standard from is: (x-h)^2 + (y-k)^2 = r^2 h and k stand for x and y coordinates of a circle's center, r is radius.

2,-2(center)

5.92(radius)

May 18th, 2015

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