how to do a 90 degree rotation with x, y – Google Search

December 9, 2025

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To do a 90-degree rotation on a point
(x,y)open paren x comma y close paren
(𝑥,𝑦) about the origin, you swap the coordinates and change the sign of one, depending on the direction: for counter-clockwise, the new point is
(−y,x)open paren negative y comma x close paren
(−𝑦,𝑥); for clockwise, the new point is
(y,−x)open paren y comma negative x close paren
(𝑦,−𝑥).

This entry was posted on December 9, 2025 at 9:56 pm and is filed under -.

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