



 
Renson, Suppose the center is (h,k), then since the center is on the line
or
Since (4,2) and (11,5) are on the circle the distance from (4,2) to (h,k) is the same as the distance from (11,5) to (h,k). Use the distance formula to write these two distances and set them equal. Substitute k = 5/3 h  41/3, expand and simplify the resulting equation (a quadratic in h) and solve for h. Equation 1 then gives you k and the distance from (h,k) to either of the given points is the radius r. Penny  


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