Creation of this resource was inspired by a[url=http://www.gogeometry.com/problem/p261_regular_pentagon_inscribed_circle_distance.htm] problem[/url] posted by [url=https://twitter.com/gogeometry]Antonio Gutierrez[/url]. [br][br]You can move[b] ANY LARGE POINT[/b] anywhere you'd like at any time. [br][br][b][color=#9900ff]How can we formally prove that what is dynamically illustrated here? [/color][/b]