rotasi 90° lawan arah jarum jam,maka (-y,x)
(1,8)→(-8,1)
(4,1)→(-1,4)
(-7,-4)→(4,-7)
Semoga bermanfaat
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rotasi 90° lawan arah jarum jam,maka (-y,x)
(1,8)→(-8,1)
(4,1)→(-1,4)
(-7,-4)→(4,-7)
Semoga bermanfaat