1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Proofs problem

  1. May 1, 2004 #1
    AB is the diameter of a semicircle. Points C and D are ANY two points on the arc of the semicircle. AD and BC intersect at E. AC and BD are extended to meet at F. Prove that FE extended is perpendicular to AB.

    I need any help possible because i have no idea of how to solve this proof problem!! plzzzzzzzzzzzzzz
     
  2. jcsd
  3. May 2, 2004 #2

    arildno

    User Avatar
    Science Advisor
    Homework Helper
    Gold Member
    Dearly Missed

    The assertion is fairly easy to prove if you rephrase it in the terms of analytical geometry.
    It looks difficult to prove it by "classical" means (i.e. identifying congruent triangles and suchlike)
     
  4. May 2, 2004 #3

    HallsofIvy

    User Avatar
    Staff Emeritus
    Science Advisor

    Use the fact that triangles ACB and ADB are right triangles with right angle at C and D.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Proofs problem
  1. Proof for this (Replies: 2)

  2. Proof problem (Replies: 2)

  3. Projectile problem proof (Replies: 13)

  4. Proof ! (Replies: 0)

Loading...