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• Understanding Point Movement on the XY Plane and on a Circle If we have: P=(x,y)P=(x,y) P=(x,y) and move to P1=(x1,y1)P_1=(x_1,y_1) P1=(x1,y1) then the change is simply: x1=x+ax_1=x+a x1=x+a y11&#....... blog.naver.com · 2026.05.27