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Math Help - Need help!

  1. #1
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    Need help!

    this is probably easy but i cant get my head around it.

    the points Q(1,3) and R(7,0) lie on line L1
    the length of QR is a√5

    fidn the value of a
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  2. #2
    Member Jason Bourne's Avatar
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    Quote Originally Posted by edwards2779 View Post
    this is probably easy but i cant get my head around it.

    the points Q(1,3) and R(7,0) lie on line L1
    the length of QR is a√5

    fidn the value of a
    a^2 + b^2 = c^2
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  3. #3
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    Quote Originally Posted by Jason Bourne View Post
    a^2 + b^2 = c^2
    sorry but that hasn't helped me at all, i know what pythagoras theorem is but i can't see how it helps with this situation because i dont know any lengths


    Edit: sorry agen about 2 seconds after i posted last it hit me, thanks for help eniway
    Last edited by mr fantastic; January 8th 2009 at 11:58 AM. Reason: Merged posts
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  4. #4
    Member Jason Bourne's Avatar
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  5. #5
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    you can find the distance by taking the square root of (x-x)^2+(y-y)^2
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