Circle Theorems

Angles in shapes, questions on circles answered
0:00 Angles on straight line
0:30 Angle sum in triangle & quadrilateral
1:07 Vertically opposite angles
1:33 Alternate angles
1:54 Corresponding angles
2:24 Tangent & radius perpendicular
3:03 2 tangents from 1 point make congruent triangles
3:57 Isosceles triangles in circles
4:48 Perpendicular bisector of chord passes through centre
5:43 Angle at centre double angle on circumference
7:00 Angle in semicircle is right-angle
7:32 Angles on circumference
8:40 Cyclic quadrilateral: opposite angles sum to 180
9:43 Alternate segment theorem
11:50 Answered questions

[jan-willemreens]

...Miss Jay, I've been watching your enjoyable presentation on 'Circle Theorems' with a smile on my face. I have found this one to be a very good repetition with regard to my geometric knowledge! I've always felt that Geometry is the neglected child of mathematics, at least in my homeland! I am mainly visually oriented, so Geometry is an attractive part for me, but certainly not always easy and transparent. I have mainly been able to follow what you have discussed in this video, but what I always do is to review everything the next day, so that I may still have a few questions. Finally I would recommend any interested viewer for Geometry to watch your entertaining and educational video. This is most certainly not a waste of time! Thank you very much, Jan-W

[rocklight]

Straight to the point and well explained. Thanks to you Jay