Home Geometry Problems All Problems 401-410 Post a comment        By Antonio Gutierrez
Problem 404. External Equilateral triangles, Congruent and Concurrent Lines. Level: High School, College, SAT Prep.

In the figure, equilateral triangles ABC', BCA', and ACB' are constructed externally on the sides of a triangle ABC. Prove that the lines AA', BB', and CC' are congruent and concurrent

Equilateral triangle, concurrent and congruent lines


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