Media Summary: 1 triangle + 2 parallel lines + 4 circumcenters = ??? How to prove? Source: Antonio Gutierrez. Link: What is the sum of the red and blue angles (soon to appear)? Why does this sum ... Triangle incircle phenomenon: How can we prove the segments congruent (at the end)? Source: Antonio Gutierrez.
Gogeometry Action 108 - Detailed Analysis & Overview
1 triangle + 2 parallel lines + 4 circumcenters = ??? How to prove? Source: Antonio Gutierrez. Link: What is the sum of the red and blue angles (soon to appear)? Why does this sum ... Triangle incircle phenomenon: How can we prove the segments congruent (at the end)? Source: Antonio Gutierrez. Here is an excellent problem from the Christmas Special Mock Geometry Olympiad, a terrific contest put together by the AoPS ...
