Media Summary: How can we formally prove THIS true (for ANY triangle)? GeoGebra Link: Link: What is the sum of the red and blue angles (soon to appear)? Why does this sum ... Interesting phenomenon that occurs in any square! Why is this? (Source: Antonio Gutierrez) ...
Gogeometry Action 123 - Detailed Analysis & Overview
How can we formally prove THIS true (for ANY triangle)? GeoGebra Link: Link: What is the sum of the red and blue angles (soon to appear)? Why does this sum ... Interesting phenomenon that occurs in any square! Why is this? (Source: Antonio Gutierrez) ... 1 triangle + 2 parallel lines + 4 circumcenters = ??? How to prove? Source: Antonio Gutierrez. In the problem, a ∆ ABC is given in such a way that D is the mid-point of AC and Ang. CAB = Ang.DBC = x. Ang. BDA = 45°. Triangle incircle phenomenon: How can we prove the segments congruent (at the end)? Source: Antonio Gutierrez.
