Visit http://ilectureonline.com for more math and science lectures!
In this video I will proof the geometry proof #5: AB=CD then AC=BD.
To donate:
http://www.ilectureonline.com/donate
https://www.patreon.com/user?u=3236071
Next video in this series can be seen at:
https://youtu.be/NFmaMUXvhYk