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MathNet 1963 — Part 01 Question 15

Math Olympiad Vault · MathNet 1963 — Part 01

Question 15

Given a circle $c$ and two fixed points $A$, $B$ on it. $M$ is another point on $c$, and $K$ is the midpoint of $BM$. $P$ is the foot of the perpendicular from $K$ to $AM$.


a. Prove that $KP$ passes through a fixed point (as $M$ varies).


b. Find the locus of $P$.