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Anonymous asked in Science & MathematicsMathematics · 2 months ago

Rotations along y-axis?

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2 Answers

  • Pope
    Lv 7
    2 months ago

    In two dimensions there is no rotation about any axis. I think I get that notation now though. You should consult your course materials to see what conventions are in use.

    I believe it must be a composite transformation. First, there is a reflection on the y-axis. Following that, there is a 90° counterclockwise rotation with respect to the origin.

    Reflection on the y-axis: (2, -3) → (-2, -3)

    Rotation 90° counterclockwise: (-2, -3) → (3, -2)

    A(2, -3) → A'(3, -2)

    The notation used for these transformations seems to change every time a new textbook is published. Your book may have a different interpretation of the direction of rotation or the order of transformations. That is why you need to check with your own course literature.

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  • Anonymous
    2 months ago

    The vertical axis is the y-axis.

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