Creation of this applet was inspired by a [url=https://twitter.com/solvemymaths/status/832686295067488258]tweet[/url] from [url=https://twitter.com/solvemymaths]Ed Southall[/url]. [br][br]This applet is a revamped version of this [url=https://www.geogebra.org/m/Vgtgext8]first version[/url]. [br][br][b][color=#0000ff]Credit for this revamped version goes to Ginger Riddle,[/color] [/b]who e-mailed me her suggestion of showing the simple 180-degree rotation at the end. [br]