Difference between revisions of "2002 IMO Problems/Problem 2"

(Created page with "==Problem== :<math>\text{BC is a diameter of a circle center O. A is any point on the circle with } \angle AOC \not\le 60</math> :<math>\text{ EF is the chord which is the per...")
 
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==Problem==
 
==Problem==
 
:<math>\text{BC is a diameter of a circle center O. A is any point on the circle with } \angle AOC \not\le 60</math>
 
:<math>\text{BC is a diameter of a circle center O. A is any point on the circle with } \angle AOC \not\le 60</math>
:<math>\text{ EF is the chord which is the perpendicular bisector of AO. D is the midpoint of the minor arc AB. The line through
+
:<math>\text{EF is the chord which is the perpendicular bisector of AO. D is the midpoint of the minor arc AB. The line through}</math>
:</math>\text{O parallel to AD meets AC at J. Show that J is the incenter of triangle CEF.}$
+
:<math>\text{O parallel to AD meets AC at J. Show that J is the incenter of triangle CEF.}</math>

Revision as of 11:21, 7 October 2022

Problem

$\text{BC is a diameter of a circle center O. A is any point on the circle with } \angle AOC \not\le 60$
$\text{EF is the chord which is the perpendicular bisector of AO. D is the midpoint of the minor arc AB. The line through}$
$\text{O parallel to AD meets AC at J. Show that J is the incenter of triangle CEF.}$