Hi

(x-1)^2 + (y+2)^2 = 1 (r^2)

(x-4)^2 + (y-1)^2 = 5^2   r^2 = (-3)^2 + 4^2 = 25

(x+3)^2 + (y-3)^2 = 20    M = (-3,3)  r^2 = 2^2+ 4^2 = 20

Use:

D = 

Midpoint Pt(x,y):  ( , )

 

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