MathDB

9

Part of 2002 JBMO ShortLists

Problems(1)

Angles in a triangle

Source: JBMO Shortlist 2002

11/12/2008
In triangle ABC,H,I,O ABC,H,I,O are orthocenter, incenter and circumcenter, respectively. CI CI cuts circumcircle at L L. If AB\equal{}IL and AH\equal{}OH, find angles of triangle ABC ABC.
geometryincentercircumcirclegeometry proposed