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Restore triangle

Source: Sharygin Geometry Olympiad 2012 - Problem 9

April 28, 2012

geometrygeometric transformationreflectiongeometry unsolved

Problem Statement

In triangle

ABC

, given lines

l_{b}

and

l_{c}

containing the bisectors of angles

B

and

C

, and the foot

L_{1}

of the bisector of angle

A

. Restore triangle

ABC