Online Geometry Problems

Plane Geometry Problem 196. Triangle, Inradius and Exradii Formula, Incenter, Incircle, Excenters, Excircles. Level: High School, College, Mathematics Education

The figure below shows a triangle ABC with the inradius r and the exradii ra, rb, rc. Prove that radius incicircle, excircle, proof.
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Triangle: inradius, exradii formula

Home | SearchGeometry | Problems | All Problems | Open Problems | Visual Index | 191-200 | TrianglesIncenter, incircle,  inradius | Excenter, excircle, exradius | Area of a TriangleEmail | View or post a solution | by Antonio Gutierrez