Results 1 to 4 of 4

Math Help - Quadrilateral PRAT

  1. #1
    MHF Contributor
    Joined
    Jul 2008
    From
    NYC
    Posts
    1,489

    Smile Quadrilateral PRAT

    The coordinates of quadrilateral
    PRAT are P(a,b)
    R(a,b + 3), A(a + 3,b + 4), and T(a + 6,b + 2). Prove that segment RA is parallel to segment PT.


    Follow Math Help Forum on Facebook and Google+

  2. #2
    A riddle wrapped in an enigma
    masters's Avatar
    Joined
    Jan 2008
    From
    Big Stone Gap, Virginia
    Posts
    2,551
    Thanks
    12
    Awards
    1
    Quote Originally Posted by magentarita View Post
    The coordinates of quadrilateral

    PRAT are P(a,b)

    R(a,b + 3), A(a + 3,b + 4), and T(a + 6,b + 2). Prove that segment RA is parallel to segment PT.

    You need to show that the slopes of RA and PT are equal.

    Slope of RA: \frac{b+4-(b+3)}{a+3-a}=\frac{1}{3}

    Slope of PT: \frac{b+2-b}{a+6-a}=\frac{2}{6}=\frac{1}{3}
    Follow Math Help Forum on Facebook and Google+

  3. #3
    MHF Contributor
    Joined
    Jul 2008
    From
    NYC
    Posts
    1,489

    I see...

    Quote Originally Posted by masters View Post
    You need to show that the slopes of RA and PT are equal.

    Slope of RA: \frac{b+4-(b+3)}{a+3-a}=\frac{1}{3}

    Slope of PT: \frac{b+2-b}{a+6-a}=\frac{2}{6}=\frac{1}{3}
    I understand now but the question did not say to show that the slopes of RA and PT are equal.

    Thanks
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Super Member Matt Westwood's Avatar
    Joined
    Jul 2008
    From
    Reading, UK
    Posts
    824
    Thanks
    33
    No but that's what "parallel" means. Think about it.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. quadrilateral
    Posted in the Geometry Forum
    Replies: 0
    Last Post: June 9th 2010, 05:39 PM
  2. Quadrilateral
    Posted in the Geometry Forum
    Replies: 2
    Last Post: April 8th 2010, 10:24 AM
  3. please help, quadrilateral
    Posted in the Geometry Forum
    Replies: 3
    Last Post: April 18th 2009, 07:52 AM
  4. quadrilateral
    Posted in the Geometry Forum
    Replies: 3
    Last Post: February 3rd 2009, 10:23 AM

Search Tags


/mathhelpforum @mathhelpforum