LIVESTREAM GEO 105B: A Powerful Use of Sondats Theorem and Four Feurbach-Like Points!

In the second half of this session we worked through three more problems from the Vietnamese journal Mathley and solved just the first.
That solution used an interesting theorem on orthologic triangles called Sondats Theorem which I had not seen in a while.
The second problem involved both the internal and the three external Feurbach Points.
We made some great progress and noticed a lot of interesting facts howeverwe werent ultimately able to solve it.
The last problem had a fairly simple statement but we werent able to solve it either feel free to let me know if you find a solution! If you would like to join future sessions feel free to email me at mgreenb801gmail.com.
The sessions are on Sundays at 8 AM US Central Time.

Источник: rutube.ru