MathDB

57

Part of 1987 IMO Longlists

Problems(1)

IMO LongList 1987-B'C' intersects incircle in two points

Source:

9/6/2010
The bisectors of the angles B,CB,C of a triangle ABCABC intersect the opposite sides in B′,C′B', C' respectively. Prove that the straight line B′C′B'C' intersects the inscribed circle in two different points.
geometrygeometric transformationreflectiongeometry proposed