G.GCI.2 Angle Formed by 2 Chords

[color=#000000]In the applet below, the [/color][b]gray angle[/b][color=#000000] is said to be an [/color][b]angle formed by 2 chords of a circle[/b][color=#000000]. [/color][color=#000000][br][br]Interact with this applet for a few minutes. As you do, be sure to change the locations of the BIG POINTS each time [/color][i][color=#000000]before[/color][/i][color=#000000] re-sliding the slider! [br][br]What are the relationships between the inscribed angles, arcs, and angles formed by intersecting chords?[br][br][/color]
Quick Demo: 0:48 sec - 1:33 sec (BGM: Edward Shearmur)

Information: G.GCI.2 Angle Formed by 2 Chords