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Math Help - Simple enlargements in a triangle

  1. #1
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    Exclamation Simple enlargements in a triangle

    Please help

    Enlarge triangle P with the scale factor of 3 and centre (3,4) What are the new co-ordinates of the new triangle if the point of the triangle P are (4,6),(5,6) and (4,8)

    I'm new to this topic and need help!!!
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  2. #2
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    Re: Simple enlargements in a triangle

    Quote Originally Posted by terone71 View Post
    Please help

    Enlarge triangle P with the scale factor of 3 and centre (3,4) What are the new co-ordinates of the new triangle if the point of the triangle P are (4,6),(5,6) and (4,8)

    I'm new to this topic and need help!!!
    1. I've labeled the vertices of the triangle with P, Q and R. The center is C.

    2. You "go" from C to P 1 step right and 2 steps up. To reach P' you have to "go" from C 1 * 3 steps right and 2 * 3 steps up. You'll end at P'(6, 10)

    3. Do the other 2 vertices similarly.

    4. Since you are horrible at math as you've stated several times I didn't use vectors which would be the simpliest way to do your question.
    Attached Thumbnails Attached Thumbnails Simple enlargements in a triangle-zentrischestreckung.png  
    Last edited by earboth; July 24th 2012 at 07:50 AM.
    Thanks from terone71
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  3. #3
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    Re: Simple enlargements in a triangle

    Thanks so much! I was in big trouble in maths!
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