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.

Home | Search | Geometry | Problems | All Problems | Open Problems | Visual Index | 771-780 | Triangles | Circle | Circumcenter | Circumcircle | Circle Tangent Line | Parallel lines | Email | Solution / comment | By Antonio Gutierrez