Results 1 to 3 of 3

Math Help - Two questions with angles and congruencies...

  1. #1
    M23
    M23 is offline
    Newbie
    Joined
    Jun 2009
    Posts
    19

    Two questions with angles and congruencies...



    Given the information in the diagram, which congruency proves that AC = DE?



    And...



    The value of θ in the above diagram, to the nearest degree is

    A. 67
    B. 134
    C. 46
    D. 113



    I've been stuck on these ones for a a bit...I don't know how to do them....
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor

    Joined
    Aug 2006
    Posts
    18,663
    Thanks
    1616
    Awards
    1
    Im am not sure what you are asking but:
    \Delta BAC \cong \Delta DED by AAS.

    \Theta  = 134^ \circ  by the inscribed angle theorem.
    Follow Math Help Forum on Facebook and Google+

  3. #3
    No one in Particular VonNemo19's Avatar
    Joined
    Apr 2009
    From
    Detroit, MI
    Posts
    1,823
    Quote Originally Posted by M23 View Post


    Given the information in the diagram, which congruency proves that AC = DE?

    I've been stuck on these ones for a a bit...I don't know how to do them....

    Since AB=EB, \angle{ABC}=\angle{DBE} (vertical angles), and m\angle{x}=m\angle{x} (reflexive property of equality), then \Delta{ABC}\cong\Delta{DBE} (AngleAngleSide).
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. principle angles and related acute angles
    Posted in the Trigonometry Forum
    Replies: 4
    Last Post: December 19th 2011, 06:40 AM
  2. Minor point of clarification regarding congruencies
    Posted in the Number Theory Forum
    Replies: 2
    Last Post: May 30th 2010, 01:23 PM
  3. Replies: 1
    Last Post: January 7th 2009, 06:07 PM
  4. Trig - Double Angles Questions, Please Help!!
    Posted in the Trigonometry Forum
    Replies: 8
    Last Post: November 18th 2007, 08:16 AM
  5. 2 Quick questions about Reference Angles
    Posted in the Pre-Calculus Forum
    Replies: 1
    Last Post: October 25th 2006, 08:43 AM

Search Tags


/mathhelpforum @mathhelpforum