Creation of this resource was inspired by this [url=http://www.gogeometry.com/school-college/5/p1408-right-triangle-circle-midpoint-collinear-ipad-sw-typography.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 [b]AT ANY TIME[/b]. [br][br][b][color=#ff7700]How can we formally prove what is dynamically illustrated here?[/color][/b]