Results 1 to 2 of 2

Math Help - Help with proof?

  1. #1
    Newbie
    Joined
    Feb 2009
    Posts
    13

    Help with proof?

    Can someone help me with this proof? Can anyone come up with a proof that is shorter than 17 steps please?

    I don't understand proofs that well so all I have to start is the given and <BAC and <BAD are right due to the definition of perpendicular...but where do I go from there...our teacher said we should have short proofs and this one should be under 17 steps preferably. Can anyone help?

    http://i34.tinypic.com/syy3bq.png
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Member
    Joined
    Oct 2009
    Posts
    147
    Thanks
    1
    AE perpendicular to AF, hence
    angle EAF = 90 degrees

    angle CAD = 180 degrees, hence
    angle 3 + angle 4 = 180 - angle EAF
    = 90 degrees
    so angles 3 and 4 are complementary
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 15
    Last Post: June 8th 2011, 11:13 AM
  2. Replies: 5
    Last Post: October 19th 2010, 10:50 AM
  3. [SOLVED] direct proof and proof by contradiction
    Posted in the Number Theory Forum
    Replies: 2
    Last Post: February 27th 2010, 10:07 PM
  4. Proof with algebra, and proof by induction (problems)
    Posted in the Discrete Math Forum
    Replies: 8
    Last Post: June 8th 2008, 01:20 PM
  5. proof that the proof that .999_ = 1 is not a proof (version)
    Posted in the Advanced Applied Math Forum
    Replies: 4
    Last Post: April 14th 2008, 04:07 PM

Search Tags


/mathhelpforum @mathhelpforum