Mathematics
Grade9
Easy

Question

Use matrix multiplication to find the image. Graph the polygon and its image.
Reflect open square brackets table attributes columnalign center center right center end attributes row 2 6 5 2 row cell negative 2 end cell cell negative 3 end cell cell negative 8 end cell cell negative 5 end cell end table close square brackets in the y-axis.

hintHint:

Obtain the matrix for the image and then plot the graph.

The correct answer is:


    * In Geometry, a reflection is known as a flip. A reflection is a mirror image of the shape. An image will reflect through a line, known as the line of reflection.
    *It is a type of transformation that produces mirror image of the shape.
    * Matrix representation is the efficient way for the transformation of points.
    * Every vertex is placed in columns.
     Given That:
    Use matrix multiplication to find the image. Graph the polygon and its image.
    Reflect open square brackets table attributes columnalign center center right center end attributes row 2 6 5 2 row cell negative 2 end cell cell negative 3 end cell cell negative 8 end cell cell negative 5 end cell end table close square brackets in the y-axis.
    *Let (a, b) be a point. Then, the point of reflection with respect to y-axis becomes (-a, b).
    * We know that reflection matrix in the y-axis: open square brackets table row cell negative 1 end cell 0 row 0 1 end table close square brackets
    open square brackets table row cell negative 1 end cell 0 row 0 1 end table close square brackets open square brackets table row 2 6 5 2 row cell negative 2 end cell cell negative 3 end cell cell negative 8 end cell cell negative 5 end cell end table close square brackets
equals open square brackets table row cell left parenthesis negative 1 right parenthesis left parenthesis 2 right parenthesis plus 0 left parenthesis negative 2 right parenthesis end cell cell left parenthesis negative 1 right parenthesis left parenthesis 6 right parenthesis plus 0 left parenthesis negative 3 right parenthesis end cell cell left parenthesis negative 1 right parenthesis left parenthesis 5 right parenthesis plus 0 left parenthesis negative 8 right parenthesis end cell cell left parenthesis negative 1 right parenthesis left parenthesis 2 right parenthesis plus 0 left parenthesis negative 5 right parenthesis end cell row cell 0 left parenthesis 2 right parenthesis plus 1 left parenthesis negative 2 right parenthesis end cell cell 0 left parenthesis 6 right parenthesis plus 1 left parenthesis negative 3 right parenthesis end cell cell 0 left parenthesis 5 right parenthesis plus 1 left parenthesis negative 8 right parenthesis end cell cell 0 left parenthesis 2 right parenthesis plus 1 left parenthesis negative 5 right parenthesis end cell end table close square brackets
equals open square brackets table attributes columnalign center center right left end attributes row cell negative 2 end cell cell negative 6 end cell cell negative 5 end cell cell negative 2 end cell row cell negative 2 end cell cell negative 3 end cell cell negative 8 end cell cell negative 5 end cell end table close square brackets
    >>>The required Graph:

    The required matrix for the image is:
    open square brackets table row cell negative 1 end cell 0 row 0 1 end table close square brackets open square brackets table row 2 6 5 2 row cell negative 2 end cell cell negative 3 end cell cell negative 8 end cell cell negative 5 end cell end table close square brackets
equals open square brackets table row cell left parenthesis negative 1 right parenthesis left parenthesis 2 right parenthesis plus 0 left parenthesis negative 2 right parenthesis end cell cell left parenthesis negative 1 right parenthesis left parenthesis 6 right parenthesis plus 0 left parenthesis negative 3 right parenthesis end cell cell left parenthesis negative 1 right parenthesis left parenthesis 5 right parenthesis plus 0 left parenthesis negative 8 right parenthesis end cell cell left parenthesis negative 1 right parenthesis left parenthesis 2 right parenthesis plus 0 left parenthesis negative 5 right parenthesis end cell row cell 0 left parenthesis 2 right parenthesis plus 1 left parenthesis negative 2 right parenthesis end cell cell 0 left parenthesis 6 right parenthesis plus 1 left parenthesis negative 3 right parenthesis end cell cell 0 left parenthesis 5 right parenthesis plus 1 left parenthesis negative 8 right parenthesis end cell cell 0 left parenthesis 2 right parenthesis plus 1 left parenthesis negative 5 right parenthesis end cell end table close square brackets
equals open square brackets table attributes columnalign center center right left end attributes row cell negative 2 end cell cell negative 6 end cell cell negative 5 end cell cell negative 2 end cell row cell negative 2 end cell cell negative 3 end cell cell negative 8 end cell cell negative 5 end cell end table close square brackets

    Related Questions to study

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    Use matrix multiplication to find the image. Graph the polygon and its image.
    Reflect open square brackets table attributes columnalign center center right center end attributes row 2 6 5 2 row cell negative 2 end cell cell negative 3 end cell cell negative 8 end cell cell negative 5 end cell end table close square brackets in the x-axis.

    The matrix representation of the image :
    open square brackets table row 1 0 row 0 cell negative 1 end cell end table close square brackets open square brackets table row 2 6 5 2 row cell negative 2 end cell cell negative 3 end cell cell negative 8 end cell cell negative 5 end cell end table close square brackets
equals open square brackets table row cell 1 left parenthesis 2 right parenthesis plus 0 left parenthesis negative 2 right parenthesis end cell cell 1 left parenthesis 6 right parenthesis plus 0 left parenthesis negative 3 right parenthesis end cell cell 1 left parenthesis 5 right parenthesis plus 0 left parenthesis negative 8 right parenthesis end cell cell 1 left parenthesis 2 right parenthesis plus 0 left parenthesis negative 5 right parenthesis end cell row cell 0 left parenthesis 2 right parenthesis plus left parenthesis negative 1 right parenthesis left parenthesis negative 2 right parenthesis end cell cell 0 left parenthesis 6 right parenthesis plus left parenthesis negative 1 right parenthesis left parenthesis negative 3 right parenthesis end cell cell 0 left parenthesis 5 right parenthesis plus left parenthesis negative 1 right parenthesis left parenthesis negative 8 right parenthesis end cell cell 0 left parenthesis 2 right parenthesis plus left parenthesis negative 1 right parenthesis left parenthesis negative 5 right parenthesis end cell end table close square brackets
equals open square brackets table attributes columnalign center center right left end attributes row 2 6 5 2 row cell negative 2 end cell cell negative 3 end cell cell negative 8 end cell cell negative 5 end cell end table close square brackets

    Use matrix multiplication to find the image. Graph the polygon and its image.
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    The matrix representation of the image :
    open square brackets table row 1 0 row 0 cell negative 1 end cell end table close square brackets open square brackets table row 2 6 5 2 row cell negative 2 end cell cell negative 3 end cell cell negative 8 end cell cell negative 5 end cell end table close square brackets
equals open square brackets table row cell 1 left parenthesis 2 right parenthesis plus 0 left parenthesis negative 2 right parenthesis end cell cell 1 left parenthesis 6 right parenthesis plus 0 left parenthesis negative 3 right parenthesis end cell cell 1 left parenthesis 5 right parenthesis plus 0 left parenthesis negative 8 right parenthesis end cell cell 1 left parenthesis 2 right parenthesis plus 0 left parenthesis negative 5 right parenthesis end cell row cell 0 left parenthesis 2 right parenthesis plus left parenthesis negative 1 right parenthesis left parenthesis negative 2 right parenthesis end cell cell 0 left parenthesis 6 right parenthesis plus left parenthesis negative 1 right parenthesis left parenthesis negative 3 right parenthesis end cell cell 0 left parenthesis 5 right parenthesis plus left parenthesis negative 1 right parenthesis left parenthesis negative 8 right parenthesis end cell cell 0 left parenthesis 2 right parenthesis plus left parenthesis negative 1 right parenthesis left parenthesis negative 5 right parenthesis end cell end table close square brackets
equals open square brackets table attributes columnalign center center right left end attributes row 2 6 5 2 row cell negative 2 end cell cell negative 3 end cell cell negative 8 end cell cell negative 5 end cell end table close square brackets

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    space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space A space space space B space space C space space space space D
M a t r i x space o f space t h e space p o l y g o n space equals open square brackets table row cell negative 3 end cell 0 cell negative 2 end cell cell negative 5 end cell row 5 4 1 2 end table close square brackets

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    The required matrix is:
    space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space A space space space B space space C space space space space D
M a t r i x space o f space t h e space p o l y g o n space equals open square brackets table row cell negative 3 end cell 0 cell negative 2 end cell cell negative 5 end cell row 5 4 1 2 end table close square brackets

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    Write the matrix for the polygon.

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    space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space A space B space C
M a t r i x space o f space t h e space p o l y g o n space equals open square brackets table attributes columnalign left end attributes row 2 6 7 row 4 1 5 end table close square brackets

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    space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space A space B space C
M a t r i x space o f space t h e space p o l y g o n space equals open square brackets table attributes columnalign left end attributes row 2 6 7 row 4 1 5 end table close square brackets

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    Use matrix multiplication to find the image. Graph the polygon and its image. Reflect  open square brackets table attributes columnalign left end attributes row 1 3 4 row 2 3 0 end table close square brackets in the y - axis.

    The required matrix is:
    open square brackets table row cell negative 1 end cell 0 row 0 1 end table close square brackets open square brackets table attributes columnalign left end attributes row 1 3 4 row 2 3 0 end table close square brackets equals open square brackets table row cell negative 1 left parenthesis 1 right parenthesis plus 0 left parenthesis 2 right parenthesis end cell cell negative 1 left parenthesis 3 right parenthesis plus 0 left parenthesis 3 right parenthesis end cell cell negative 1 left parenthesis 4 right parenthesis plus 0 left parenthesis 0 right parenthesis end cell row cell 0 left parenthesis 1 right parenthesis plus 1 left parenthesis 2 right parenthesis end cell cell 0 left parenthesis 3 right parenthesis plus 1 left parenthesis 3 right parenthesis end cell cell 0 left parenthesis 4 right parenthesis plus 1 left parenthesis 0 right parenthesis end cell end table close square brackets equals open square brackets table row cell negative 1 end cell cell negative 3 end cell cell negative 4 end cell row 2 3 0 end table close square brackets

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    MathematicsGrade9

    The required matrix is:
    open square brackets table row cell negative 1 end cell 0 row 0 1 end table close square brackets open square brackets table attributes columnalign left end attributes row 1 3 4 row 2 3 0 end table close square brackets equals open square brackets table row cell negative 1 left parenthesis 1 right parenthesis plus 0 left parenthesis 2 right parenthesis end cell cell negative 1 left parenthesis 3 right parenthesis plus 0 left parenthesis 3 right parenthesis end cell cell negative 1 left parenthesis 4 right parenthesis plus 0 left parenthesis 0 right parenthesis end cell row cell 0 left parenthesis 1 right parenthesis plus 1 left parenthesis 2 right parenthesis end cell cell 0 left parenthesis 3 right parenthesis plus 1 left parenthesis 3 right parenthesis end cell cell 0 left parenthesis 4 right parenthesis plus 1 left parenthesis 0 right parenthesis end cell end table close square brackets equals open square brackets table row cell negative 1 end cell cell negative 3 end cell cell negative 4 end cell row 2 3 0 end table close square brackets

    Grade9
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    Use matrix multiplication to find the image. Graph the polygon and its image. Reflect
    open square brackets table attributes columnalign left end attributes row 1 3 4 row 2 3 0 end table close square brackets in the x - axis.

    >>>Since, it is reflected on x-axis, the matrix multiplication looks like:
    open square brackets table row 1 0 row 0 cell negative 1 end cell end table close square brackets open square brackets table attributes columnalign left end attributes row 1 3 4 row 2 3 0 end table close square brackets equals open square brackets table row cell 1 left parenthesis 1 right parenthesis plus 0 left parenthesis 2 right parenthesis end cell cell 1 left parenthesis 3 right parenthesis plus 0 left parenthesis 3 right parenthesis end cell cell 1 left parenthesis 4 right parenthesis plus 0 left parenthesis 0 right parenthesis end cell row cell 0 left parenthesis 1 right parenthesis plus left parenthesis negative 1 right parenthesis 2 end cell cell 0 left parenthesis 3 right parenthesis plus left parenthesis negative 1 right parenthesis left parenthesis 3 right parenthesis end cell cell 0 left parenthesis 4 right parenthesis plus left parenthesis negative 1 right parenthesis left parenthesis 0 right parenthesis end cell end table close square brackets equals open square brackets table row 1 3 4 row cell negative 2 end cell cell negative 3 end cell 0 end table close square brackets

    Use matrix multiplication to find the image. Graph the polygon and its image. Reflect
    open square brackets table attributes columnalign left end attributes row 1 3 4 row 2 3 0 end table close square brackets in the x - axis.

    MathematicsGrade9

    >>>Since, it is reflected on x-axis, the matrix multiplication looks like:
    open square brackets table row 1 0 row 0 cell negative 1 end cell end table close square brackets open square brackets table attributes columnalign left end attributes row 1 3 4 row 2 3 0 end table close square brackets equals open square brackets table row cell 1 left parenthesis 1 right parenthesis plus 0 left parenthesis 2 right parenthesis end cell cell 1 left parenthesis 3 right parenthesis plus 0 left parenthesis 3 right parenthesis end cell cell 1 left parenthesis 4 right parenthesis plus 0 left parenthesis 0 right parenthesis end cell row cell 0 left parenthesis 1 right parenthesis plus left parenthesis negative 1 right parenthesis 2 end cell cell 0 left parenthesis 3 right parenthesis plus left parenthesis negative 1 right parenthesis left parenthesis 3 right parenthesis end cell cell 0 left parenthesis 4 right parenthesis plus left parenthesis negative 1 right parenthesis left parenthesis 0 right parenthesis end cell end table close square brackets equals open square brackets table row 1 3 4 row cell negative 2 end cell cell negative 3 end cell 0 end table close square brackets

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    Find point C on the x-axis, so AC + BC is minimum.
    A(4, -3), B (8, -5)

    >>>Finding A'B line AB' line intersection point gives the point that gives minimum sum of AC and BC on x-axis.
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    Find point C on the x-axis, so AC + BC is minimum.
    A(4, -3), B (8, -5)

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    >>>Finding A'B line AB' line intersection point gives the point that gives minimum sum of AC and BC on x-axis.
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    parallel
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    Find point C on the x-axis, so AC + BC is minimum.
    A(2, 4), B (6, 2)

    The point present in the x-axis. and also on the line image of A and point B.
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    Find point C on the x-axis, so AC + BC is minimum.
    A(2, 4), B (6, 2)

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    The point present in the x-axis. and also on the line image of A and point B.
    >>>From the given data the point  becomes (4.7,0)

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    What is the line of reflection for triangle A B C and its image?

    From the graph, the line of reflection is x= -1

    What is the line of reflection for triangle A B C and its image?

    MathematicsGrade9

    From the graph, the line of reflection is x= -1

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    What is the line of reflection for triangle A B C and its image?

    From the graph, the line of reflection is y-axis.

    What is the line of reflection for triangle A B C and its image?

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    From the graph, the line of reflection is y-axis.

    parallel

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