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The figure below shows a triangle ABC with D on AC. E is the incenter of triangle ABD and F is the incenter of triangle BDC. Prove that angle AEB + angle BFC = 270 degrees.
Home | Search | Geometry | Problems | All Problems | Open Problems | Visual Index | 10 Problems | Ten problems: 1321-1330 | Triangles | Incenter | Angles | Angle Bisector | Email | Solution / comment | by Antonio Gutierrez