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Geometry Problem. Post your solution in the comment box below.Level: Mathematics Education, High School, Honors Geometry, College.Click the figure below to view more details of problem 1242.
Let BC and AD extended meet at PThen C2 is the excentre of Tr. PCDC1 is the in Centre of Tr. PCDA2 is the in Centre of Tr. PABA1 is the excentre of Tr. PABIt follows that PC1C2A2A1 are collinear points, being on the internal bisector of < P. The concurrency of BC,AD and this line is also self evidentSimilarly for AB and DC extended which when extended say meets at Q. Then Q and B1,B2,D1,D2 are collinear and the concurrency of this line and AB and DC is evidentSumith PeirisMoratuwaSri Lanka