Results 1 to 4 of 4

Thread: Express Y coordiante

  1. #1
    Junior Member
    Joined
    Mar 2010
    Posts
    27

    Express Y coordiante

    Hello
    Help with the question on my drawing please?
    its a rectangle in isoceles right triangle
    Attached Thumbnails Attached Thumbnails Express Y coordiante-y-coor.jpg  
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    Grandad's Avatar
    Joined
    Dec 2008
    From
    South Coast of England
    Posts
    2,570
    Thanks
    1
    Hello BadMonkey
    Quote Originally Posted by BadMonkey View Post
    Hello
    Help with the question on my drawing please?
    its a rectangle in isoceles right triangle
    If the triangles are isosceles and right-angled, then B is the point $\displaystyle (0,1)$. So the equation of AB is
    $\displaystyle x+y=1$
    So, making $\displaystyle y$ the subject:
    $\displaystyle y = 1-x$
    which gives the value of $\displaystyle y$ at the point P.

    Grandad
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Junior Member
    Joined
    Mar 2010
    Posts
    27
    Thanks
    I got that but I was no sure if it was correct

    but I done it this way y-y1=m(x-x1)
    1-x=0(1-x)
    would it be correct to write it like this also?
    Follow Math Help Forum on Facebook and Google+

  4. #4
    MHF Contributor
    Grandad's Avatar
    Joined
    Dec 2008
    From
    South Coast of England
    Posts
    2,570
    Thanks
    1
    Hello BadMonkey
    Quote Originally Posted by BadMonkey View Post
    Thanks
    I got that but I was no sure if it was correct

    but I done it this way y-y1=m(x-x1)
    You can certainly use
    $\displaystyle y-y_1=m(x-x_1)$
    to get the equation of the line. Using
    $\displaystyle x_1=1,\;y_1=0$ and $\displaystyle m = -1$
    gives
    $\displaystyle y-0=-1(x-1)$

    $\displaystyle \Rightarrow y = 1-x$
    But this line doesn't make sense, and is not correct:
    Quote Originally Posted by BadMonkey View Post
    1-x=0(1-x)
    would it be correct to write it like this also?
    Grandad
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Express 2x^2-28x+53
    Posted in the Algebra Forum
    Replies: 7
    Last Post: May 16th 2011, 05:27 AM
  2. Different way to express this set
    Posted in the Discrete Math Forum
    Replies: 2
    Last Post: Feb 21st 2011, 11:46 AM
  3. express in m and n
    Posted in the Trigonometry Forum
    Replies: 5
    Last Post: Jul 22nd 2010, 09:15 PM
  4. express in z=a+bi
    Posted in the Calculus Forum
    Replies: 1
    Last Post: Apr 14th 2009, 11:52 PM
  5. way to express ans
    Posted in the Trigonometry Forum
    Replies: 8
    Last Post: Apr 17th 2006, 07:00 AM

Search Tags


/mathhelpforum @mathhelpforum