Creation of this applet was inspired by a [url=http://www.gogeometry.com/school-college/3/p1281-triangle-circle-diameter-tangent-angle-bisector-tutoring.htm]problem[/url] posted by [url=https://twitter.com/gogeometry]Antonio Gutierrez[/url] (GoGeometry). [br][br]You can move any of the [b]LARGE POINTS[/b] anywhere you'd like at ANY TIME.[br][br][b][color=#ff00ff]How can we prove the two pink angles (soon to appear) ALWAYS remain CONGRUENT? [/color][/b]