The rule for rotation 90 degrees counterclockwise

What is the rule for 90 degrees counterclockwise. Rule for rotation 90 degrees counterclockwise about the origin. How to do a rotation 90 degrees counterclockwise. Article When we rotate a 90 degree digit clockwise, each point of the given figure must be changed from (x,y) to (y, -x) and graph the rotated figure. Let’s look at some examples ... ................
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