What rule describes the rotation about the origin

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What rule describes the rotation about the origin

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Alice 2 months 2021-10-09T02:10:46+00:00 1 Answer 0 views 0

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    2021-10-09T02:12:03+00:00

    when you rotate a point 180° counterclockwise rotation about the origin , the x and y-coordinates change their sign.
    not sure if this is right but i tried

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45:7+7-4:2-5:5*4+35:2 =? ( )