MathDB

36

Part of 1966 IMO Shortlist

Problems(1)

Poland 6

Source: IMO LongList 1959-1966 Problem 36

9/2/2004
Let ABCDABCD be a quadrilateral inscribed in a circle. Show that the centroids of triangles ABC,ABC, CDA,CDA, BCD,BCD, DABDAB lie on one circle.
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