[b]In any triangle, the center of the circle that passes through the INCENTER of a triangle and ANY 2 OF THIS TRIANGLE'S VERTICES lies on the[color=#9900ff] bisector of the third angle of that triangle.[/color] [/b][br][br]For more information, see this [url=https://twitter.com/CutTheKnotMath/status/855855860345708544]tweet[/url] from [url=https://twitter.com/CutTheKnotMath]Alexander Bogomolny[/url].