Alert icon
We're changing our privacy policy. This stuff matters.  Learn more  Dismiss

WT38: More about the cross ratio

Loading...

Sign in or sign up now!
1,894
Loading...
Alert icon
Sign in or sign up now!
Alert icon

Uploaded by on Jun 1, 2009

We extend the cross ratio from four collinear points to four concurrent lines, and introduce the special cases of harmonic ranges and harmonic pencils.

This video is part of the WildTrig series, which introduces Rational Trigonometry and applies it to many different aspects of geometry.

  • likes, 0 dislikes

Link to this comment:

Share to:
see all

All Comments (4)

Sign In or Sign Up now to post a comment!
  • wala

  • Is spread (a,c) the same as angle between a and c?

  • Well done, again.

  • Thanks.

Loading...

0 / 00Unsaved Playlist Return to active list
    1. Your queue is empty. Add videos to your queue using this button:
      or sign in to load a different list.
    Loading...Loading...Saving...
    • Clear all videos from this list
    • Learn more