olymmath

HK-PC 2020 Problem 5

    In ΔABC\Delta ABC , let DD be a point on side BCBC . Suppose the incircle ω1\omega_1 of ΔABD\Delta ABD touches sides ABAB and ADAD at E,FE,F respectively, and the incircle ω2\omega_2 of ΔACD\Delta ACD touches sides ADAD and ACAC at F,GF,G respectively. Suppose the segment EGEG intersects ω1\omega_1 and ω2\omega_2 again at PP and QQ respectively. Show that line ADAD , tangent of ω1\omega_1 at PP and tangent of ω2\omega_2 at QQ are concurrent.

    Dataset text AI-MO AoPS. Quoted with source.

    Solutions

    No solution is on olymmath yet. Official and human solutions come first when they arrive. AI solutions come after them, with a label.

    Add a solution

    Similar problems

    These problems have the most words in common with this statement.

    Locator hk-pc/2020/p5 · Tag 7WSMJNC968 · Edit this page on GitHub · Keys: j next, k previous