Results 1 to 6 of 6

Math Help - similar triangles

  1. #1
    Senior Member
    Joined
    Aug 2009
    Posts
    349

    similar triangles

    ok so im not really getting this problem. when i first did the problem i got 180 as an answer. i tried to use the idea that the opposite angles were equal. im sure im saying it wrong, but that approach was wrong. this is what i do know, no matter what x + y + z plus the other 3 angles must add up to 180 degrees
    Attached Thumbnails Attached Thumbnails similar triangles-imag0114.jpg  
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    skeeter's Avatar
    Joined
    Jun 2008
    From
    North Texas
    Posts
    11,690
    Thanks
    448

    Re: similar triangles

    similar triangles have equal angles ... a = 70

    (x+y+z) + 3(40) = 360
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Senior Member
    Joined
    Aug 2009
    Posts
    349

    Re: similar triangles

    wait the book says 240 degrees
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Senior Member
    Joined
    Aug 2009
    Posts
    349

    Re: similar triangles

    ok i got it....thx
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Junior Member
    Joined
    Nov 2011
    From
    Karachi
    Posts
    36

    Re: similar triangles

    Since the two angles in the bottommost triangle are 70, the third angle would be 180 - 2(70)
    Multiply this angle by three since this angle is the same for all three triangles.

    Then Subtract this value from 360 and you get x + y + z = 240
    Follow Math Help Forum on Facebook and Google+

  6. #6
    MHF Contributor
    skeeter's Avatar
    Joined
    Jun 2008
    From
    North Texas
    Posts
    11,690
    Thanks
    448

    Re: similar triangles

    Quote Originally Posted by cosmonavt View Post
    Since the two angles in the bottommost triangle are 70, the third angle would be 180 - 2(70)
    Multiply this angle by three since this angle is the same for all three triangles.

    Then Subtract this value from 360 and you get x + y + z = 240
    ... as was stated in post #2.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Similar Triangles II
    Posted in the Geometry Forum
    Replies: 1
    Last Post: November 13th 2010, 12:41 PM
  2. Similar Triangles III
    Posted in the Geometry Forum
    Replies: 1
    Last Post: November 13th 2010, 12:40 PM
  3. similar triangles
    Posted in the Geometry Forum
    Replies: 1
    Last Post: December 21st 2009, 01:49 AM
  4. similar triangles
    Posted in the Geometry Forum
    Replies: 2
    Last Post: January 30th 2009, 09:38 AM
  5. Similar Triangles
    Posted in the Geometry Forum
    Replies: 2
    Last Post: November 24th 2008, 09:04 PM

Search Tags


/mathhelpforum @mathhelpforum