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MathNet 2013 Question 19

Math Olympiad Vault · MathNet 2013

Question 19

In an acute triangle the feet of altitudes drawn from vertices $A$ and $B$ are $D$ and $E$, respectively. Let $M$ be the midpoint of side $AB$. Line $CM$ intersects the circumcircle of $CDE$ again in point $P$ and the circumcircle of $CAB$ again in point $Q$. Prove that

$$
|MP| = |MQ|.
$$