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Extended Concurrencies of a Triangle

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Visit this site: http://jwilson.coe.uga.edu/EMT669/essays/concurrent.html
Author:Jim Wilson; Dept. of Mathematics Education, Univ. of Georgia
Description: An exploration: take any triangle ABC. Construct equilateral triangles externally on each side and locate the center of each equilateral triangle. Label these centers A', B', and C' for the triangle centers opposite angles A, B, and C. Construct lines AA', BB', and CC'. Observe. A demonstration, and a proof, with extensions and Sketchpad sketches to download.
Levels: High School (9-12)
Languages: English
Resource Types: Lesson Plans and Activities, Articles, Documents/Sketches/Galleries, Geometer's Sketchpad
Math Topics: Triangles and Other Polygons

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