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. Another interesting parallelogram phenomenon. How easy would this be for our Ss prove? Source: Antonio Gutierrez ...
Gogeometry Action 21 - 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. Another interesting parallelogram phenomenon. How easy would this be for our Ss prove? Source: Antonio Gutierrez ... An unusual (not often seen) sufficient condition that guarantees a quadrilateral to be a parallelogram. How to prove? Source: ... 1 triangle + 2 parallel lines + 4 circumcenters = ??? How to prove? Source: Antonio Gutierrez.
