Cut-The-Knot Action 10!

Dynamic & Modifiable Illustration: Center of a circle that passes through 2 of a triangle's vertices AND its INCENTER also lies on the bisector of the original triangle's 3rd angle. (T/Y to Alexander Bogomolny.)
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Tim Brzezinski —

 
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angle-bisector  ccss  ccss.hsg.c.a.2  ccss.hsg.co.c.10  circle  circumcenter  circumcircle  collinear  common  common-core  concurrency concurrent concurrent-lines core incenter incircle inscribed point-of-concurrency problem-set-problem problem-set-problems theorem Više...
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