Angle Formed by 2 Chords (II)

In the applet below, the gray angle is said to be an angle formed by 2 chords of a circle. This applet accompanies the Angle Formed by 2 Chords (Part 2) activity sheet you received at the beginning of class. Before answering the questions on this sheet, interact with this applet for a few minutes. As you do, be sure to change the locations of the BIG POINTS each time before re-sliding the slider!

Quick Demo: 0:48 sec - 1:33 sec (BGM: Edward Shearmur)