MathDB
a MID(point) geo problem

Source: EGMO 2023/2

April 16, 2023
EGMOEGMO 2023geometryeasy geometry

Problem Statement

We are given an acute triangle ABCABC. Let DD be the point on its circumcircle such that ADAD is a diameter. Suppose that points KK and LL lie on segments ABAB and ACAC, respectively, and that DKDK and DLDL are tangent to circle AKLAKL. Show that line KLKL passes through the orthocenter of triangle ABCABC.