olymmath

PL-OM 2019 Problem 6

    Denote by Ω\Omega the circumcircle of the acute triangle ABCABC . Point DD is the midpoint of the arc BCBC of Ω\Omega not containing AA . Circle ω\omega centered at DD is tangent to the segment BCBC at point EE . Tangents to the circle ω\omega passing through point AA intersect line BCBC at points KK and LL such that points B,K,L,CB, K, L, C lie on the line BCBC in that order. Circle γ1\gamma_1 is tangent to the segments ALAL and BLBL and to the circle Ω\Omega at point MM . Circle γ2\gamma_2 is tangent to the segments AKAK and CKCK and to the circle Ω\Omega at point NN . Lines KNKN and LMLM intersect at point PP . Prove that ∢KAP=∢EAL\sphericalangle KAP = \sphericalangle EAL .

    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 pl-om/2019/p6 · Tag 9FEH984GMQ · Edit this page on GitHub · Keys: j next, k previous