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.pre-college

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

Topic: hi,friends(4)
Replies: 0  

Advanced Search

Back to Topic List Back to Topic List  
China -->hk

Posts: 43
Registered: 1/23/07
Posted: May 26, 2007 3:52 AM
  Click to see the message monospaced in plain text Plain Text   Click to reply to this topic Reply

please help me!
A quadrilateral ABCD inscribed in a circle, and side AB,DC meet(intersect) at E,side AD,BC meet(intersect) at F,angle E's bisector line EP and angle F's bisector line FP meet at P,then EP is perpendicular to FP. How can we using vector to prove it?

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.