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    Triangle R has vertices (0,0) (3,0) and (0,2). Find coordinates of the vertices of the image R under transformation(imagine another line after the one) ( 4 1 -2 3) . No clue what to do here. Any hints would be great.
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    (Original post by Nirm)
    Triangle R has vertices (0,0) (3,0) and (0,2). Find coordinates of the vertices of the image R under transformation(brackets are meant to be one) ( 4 1) . No clue what to do here. Any hints would be great. (-2 3)
    See page 8 in the attached.
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    (Original post by brianeverit)
    See page 8 in the attached.
    It does help but i am not sure how to really apply it to this question and also somehow the text messed up because 4 1 -2 3 is meant to be a 2x2 matrice i with 4 1 on top and -2 3 on the bottom.
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    (Original post by Nirm)
    It does help but i am not sure how to really apply it to this question and also somehow the text messed up because 4 1 -2 3 is meant to be a 2x2 matrice i with 4 1 on top and -2 3 on the bottom.
    Form a matrix from the coordinates as follows \begin{pmatrix}0&3&0\\0&0&2 \end{pmatrix} and pre-multiply by your trransformation matrix.
    Example. If thr triangle was A(2,3),B(4,1),C(2,2) and the transformation matrix was \begin{pmatrix} 2&1 \\ 1&2 \end{pmatrix} then you would have
    \begin{pmatrix} 2&1 \\ 1&2 \end{pmatrix} \begin{pmatrix} 2&4&2 \\ 3&1&2 \end{pmatrix} = \begin{pmatrix} 7&9&6 \\ 7&6&6 \end{pmatrix}
    so the image triangle would be A'(7,7),B'(9,6),C'(6,6)
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    (Original post by brianeverit)
    Form a matrix from the coordinates as follows \begin{pmatrix}0&3&0\\0&0&2 \end{pmatrix} and pre-multiply by your trransformation matrix.
    Example. If thr triangle was A(2,3),B(4,1),C(2,2) and the transformation matrix was \begin{pmatrix} 2&1 \\ 1&2 \end{pmatrix} then you would have
    \begin{pmatrix} 2&1 \\ 1&2 \end{pmatrix} \begin{pmatrix} 2&4&2 \\ 3&1&2 \end{pmatrix} = \begin{pmatrix} 7&9&6 \\ 7&6&6 \end{pmatrix}
    so the image triangle would be A'(7,7),B'(9,6),C'(6,6)
    Ahhhh okay that makes sense. Thank you for you help!
 
 
 
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