Rotate the point (3,0)(3, 0)(3,0) by 90∘90^\circ90∘ counter-clockwise about the origin.
(0,3)(0, 3)(0,3)
(3,0)(3, 0)(3,0)
(0,−3)(0, -3)(0,−3)
(−3,0)(-3, 0)(−3,0)