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The Angle Bisectors

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Visit this site: http://www.cut-the-knot.org/triangle/ABisector.html
Author:Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny
Description: A discussion of why the angle-bisectors of a triangle meet at the incenter of the triangle, in several different ways, involving: cevians, the transitivity property of equality, axes of a 2-line, altitudes and orthic triangles, and complex numbers.
Levels: High School (9-12), College
Languages: English
Resource Types: Web Interactive/Java
Math Topics: Triangles and Other Polygons

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