[color=#000000]What cool, yet-not-often-seen-or-well-known, theorem is dynamically being illustrated here?[br][br]Feel free to use the [/color][color=#1e84cc][b]blue slider[/b][/color][color=#000000] to adjust the size of the [/color][color=#1e84cc][b]blue angle[/b][/color][color=#000000].[br]Also, be sure to move the [/color][color=#9900ff][b]purple point[/b][/color][color=#000000] around the triangle! [/color]