To rotate a triangle 90 clockwise around the origin we negate the x coordinate, and then swap it with the y coordinate
Represent the coordinate of the triangle with
Triangle = (x, y)
The rule of 90 degrees clockwise rotation around the origin is
(x, y) = (y, -x)
This means that we negate the x coordinate, and then swap it with the y coordinate
Hence, to rotate a triangle 90 clockwise around the origin we negate the x coordinate, and then swap it with the y coordinate
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