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(0-a)^2 + (0-b)^2 = r^2, (0-a)^2 + (66-b)^2 = r^2, (72-a)^2 + (96-b)^2 = r^2
(0-a)^2 + (0-b)^2 = r^2, (0-a)^2 + (66-b)^2 = r^2, (72-a)^2 + (96-b)^2 = r^2
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