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Let A, B, C be points on circle O such that AB is a diameter, and CO is perpendicular to AB. Let P be a point on OA, and let line CP intersect the circle again at Q. If OP=20 and PQ=7, find r^2, where r is the radius of the circle.


 Mar 6, 2020
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r² = 625   smiley

 Mar 7, 2020
edited by Guest  Mar 7, 2020

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