MathDB
tangent circles

Source: I Soros Olympiad 1994-95 Round 2 9.6 https://artofproblemsolving.com/community/c2416727_soros_olympiad_in_mathematics

May 25, 2024
geometrytangent circles

Problem Statement

A circle can be drawn around the quadrilateral ABCDABCD. KK is a point on the diagonal BDBD . The straight line CKCK intersects the side ADAD at the point MM. Prove that the circles circumscribed around the triangles BCKBCK and ACMACM are tangent.