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Archive for Tháng Tư, 2014

Problem (me): Given triangle ABC with its circumcircle (O). Let L be an arbitrary point on arc BC which does not contain A. Prove that the A-mixtilinear incircle of triangle ABC, P-mixtilinear incircles of triangles PAB and PAC have a common tangent.

Mixtilinear2Proof: See here

 

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