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An Old Geometry Problem
Posted:
Nov 7, 2010 9:37 AM


Recently I came across a paper by Tom Rike namely "An Intriguing Geometry Problen".Here he has mentioned following problem which was asked in Pythagoras Olympiad in the Netherlands in 1980.Retry to discover its beauty
In triangle ABC, point D is such that angle DCA=angle DCB=angle DBC=10 degree and angle DBA=20 degree.Find the measure of angle CAD.



