The Math Forum

Search All of the Math Forum:

Views expressed in these public forums are not endorsed by NCTM or The Math Forum.

Math Forum » Discussions » Math Topics » geometry.research

Notice: We are no longer accepting new posts, but the forums will continue to be readable.

Topic: Concurrency-Three parabolas sharing common directrix.
Replies: 2   Last Post: Feb 6, 2014 7:41 AM

Advanced Search

Back to Topic List Back to Topic List Jump to Tree View Jump to Tree View   Messages: [ Previous | Next ]
Emmanuel José García

Posts: 2
From: Dominican Republic
Registered: 1/22/14
Concurrency-Three parabolas sharing common directrix.
Posted: Jan 22, 2014 9:20 PM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

If three parabolas share a common directrix and each pair intersect each other in two points, then, the lines joining the two intersection points of each pair of parabolas are concurrent.

The proof is kind of simple so my question is:

Has anyone seen this before? Any reference?

Point your RSS reader here for a feed of the latest messages in this topic.

[Privacy Policy] [Terms of Use]

© The Math Forum at NCTM 1994-2018. All Rights Reserved.