ISL 2020 G8
Let and be the circumcircle and the incenter of an acute-angled triangle . Two circles and passing through and , respectively, are tangent at . Let meet the shorter arc of and segment again at and , respectively. Similarly, let meet the shorter arc of and segment again at and , respectively. The rays and meet at , and the tangents to and at and , respectively, meet at . Prove that the points , and are collinear. (Netherlands)
Official text Transcription from NuminaMath olympiads, checked word for word against the official paper. Quoted with source.
Official text: IMO 2020 Shortlist booklet, page 11.
Solutions
Official solution Solution 1 by the IMO Problem Selection Committee
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