Hi,

    Standard Form of an Equation of a Circle is 

where Pt(h,k) is the center and r is the radius 

 (x-4)^2 + (y+2)^2 = r^2

finding r as  distance between points (-2,10) and (4, -2). 

 r^2 =  6^2  + (-12)^2 = 180    r = 13.4

    (x-4)^2 + (y+2)^2 = 180 



 

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