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After rotating the points A, B, and C by 180° clockwise about the origin, we get the following new coordinates:
A' = (-2, -1)
B' = (-4, -2)
C' = (-3, -5)
Plotting these new points as a triangle, we have:
A' = (-2, -1)
B' = (-4, -2)
C' = (-3, -5)
Connecting these points, we get a rotated triangle ABC.