All about flooble | fun stuff | Get a free chatterbox | Free JavaScript | Avatars    
perplexus dot info

Home > Shapes > Geometry
Slope products (Posted on 2011-11-08) Difficulty: 1 of 5
It is a well known result from algebra that if two lines are perpendicular then the product of their slopes is always -1.*

Give a very simple proof that if the lines form any angle besides 90o the product of the slopes cannot be a constant.

*Assuming neither line is vertical.

See The Solution Submitted by Jer    
No Rating

Comments: ( Back to comment list | You must be logged in to post comments.)
Some Thoughts re: Solution Comment 3 of 3 |
(In reply to Solution by Paul)

Original and nicely presented!
  Posted by Ady TZIDON on 2011-11-09 03:55:20

Please log in:
Login:
Password:
Remember me:
Sign up! | Forgot password


Search:
Search body:
Forums (0)
Newest Problems
Random Problem
FAQ | About This Site
Site Statistics
New Comments (1)
Unsolved Problems
Top Rated Problems
This month's top
Most Commented On

Chatterbox:
Copyright © 2002 - 2017 by Animus Pactum Consulting. All rights reserved. Privacy Information