2020 PUMaC Geometry A4 / B6
Source:
December 31, 2021
geometry
Problem Statement
Let be a circle centered at point , and let be a point in the interior of . Let be a point on the circumference of such that , and let be the circle with diameter . Consider a circle tangent to whose circumference passes through point . Let the curve be the locus of the centers of all such circles. If the area enclosed by is the area of , then what is the ratio of the area of to the area of ?