Creation of this resource was inspired by a [url=http://www.gogeometry.com/school-college/p810-trisecting-segment-2-circles-8-lines.htm]problem[/url] posted by [url=https://twitter.com/gogeometry]Antonio Gutierrez[/url] (GoGeometry). [br][br]Goal here is to [b][color=#9900ff]TRISECT[/color][/b] the segment shown below.[br]That is, our goal is to [b][color=#9900ff]cut this segment into 3 congruent segments.[/color][/b] [br] [br]Slide the slider slowly. As you do, carefully observe what happens. [br][br]You can move the 2 LARGE POINTS (segment endpoints) anywhere you'd like at any time. [br][br][color=#9900ff][b]How can we formally prove why this method of segment trisection actually works? [/b][/color]