prove tangent to (ABD) at B bisects EC
Source: Sharygin Finals 2023 9.5
August 2, 2023
geometrySharygin Geometry OlympiadSharygin 2023Isosceles Triangle
Problem Statement
A point lie on the lateral side of an isosceles triangle . The ray meets the line passing through and parallel to the base at point . Prove that the tangent to the circumcircle of triangle at bisects .