Online Geometry Problems

Online Geometry Problem 774: Triangle, Two Altitudes, Circumcircle, Tangent at a Vertex, Parallel. Level: High School, College, Mathematics Education

The figure below shows a triangle ABC with the altitudes AD and CE. Prove that the tangent to the circumcircle at the vertex B is parallel to ED.

Triangle, Altitudes, Circumcircle, Tangent, Parallel
 


 

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