Two points are centrally symmetric if they lie on one straight line with the center of symmetry

Two points are centrally symmetric if they lie on one straight line with the center of symmetry and are at an equal distance from it.

Point O lies between point A and point B, suppose that the segments OA and OB are equal, but by the condition of the problem, we know that point A is not symmetric to point B with respect to point O, that is, based on the definition of symmetry OA is not equal OВ.



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