A short video demonstrating a proof of the theorem that the angle in a semicircle is a right angle
Download this video for handheld devices    See also: Angle in a semicircle ...

The video content presented here requires a more recent version of the Adobe Flash Player. If you are you using a browser with JavaScript disabled please enable it now. Otherwise, please update your version of the free Flash Player by downloading here.

All pages and content are Copyright © R F Barrow, 2001 - 2016. All rights reserved.