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2020 PUMaC Geometry A4 / B6

Source:

December 31, 2021
geometry

Problem Statement

Let CC be a circle centered at point OO, and let PP be a point in the interior of CC. Let QQ be a point on the circumference of CC such that PQOPPQ \perp OP, and let DD be the circle with diameter PQPQ. Consider a circle tangent to CC whose circumference passes through point PP. Let the curve Γ\Gamma be the locus of the centers of all such circles. If the area enclosed by Γ\Gamma is 1/1001/100 the area of CC, then what is the ratio of the area of CC to the area of DD?