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Mathematics, 23.02.2021 17:20 larissa1013

A circle has centre ( -2, 2 ) and the point ( 1, 6 ) lies on the circumference of the circle,
What is the equation of the circle?

i got the answer but why is the radius 5square??

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A circle has centre ( -2, 2 ) and the point ( 1, 6 ) lies on the circumference of the circle,
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