Theory
Procedure
Animation
Simulator
Self Evaluation
Reference
Feedback
//www.youtube.com/watch?v=qwz80uMEvN4
//www.youtube.com/watch?v=0B0v0NCHZx0
http://www.geogebratube.org/material/show/id/10769
http://wiki.answers.com/Q/Angle_subtended_by_an_arc_is_double_the_angle_subtended_by_it_at_any_other_point_on_the_remaining_part_of_the_circle
http://www.mathsrevision.net/gcse-maths-revision/shape-and-space/circle-theorem