Rotation 90 degrees counterclockwise about the origin flip x and y, and make y negative.
Define rotation.
Shapes can be rotated by being moved around a fixed point (clockwise or anticlockwise, and by a certain number of degrees). Although the shape will remain precisely the same, its location within the room will shift. Each point in a figure is transformed into a rotation by rotating it a specific amount of degrees around another point.
Given
Rotation 90 degrees counterclockwise about the origin.
Our point A(x,y) becomes A' when a point is rotated 90 degrees counterclockwise about the origin (-y,x). To put it another way, flip x and y, and make y negative.
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