Media Summary: 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. 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°.
Gogeometry Action 20 - Detailed Analysis & Overview
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. 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°. How can we formally prove the two pink angles (at the end) are ALWAYS CONGRUENT? GeoGebra resource link: ... What is the measure of the pink angle? How can we prove this true (without seeing the "green triangle" hint)? GeoGebra ... How can we formally prove THIS true (for ANY triangle)? GeoGebra Link:
GeoGebra Resource Link: Inspired by Antonio Gutierrez (
