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


Home | SearchGeometry | Problems | All Problems | Open Problems | Visual Index | 771-780 | TrianglesCircle | Circumcenter | Circumcircle | Circle Tangent LineParallel lines | Email | Solution / comment | By Antonio Gutierrez