SOLUTION: what does reflection of in the origin mean

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Question 551420: what does reflection of in the origin mean
Answer by KMST(5328) About Me  (Show Source):
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For a point (P), reflection in the origin would mean walk to the origin, and then keep walking the same distance in the same direction, going from (x,y) to (-x,-y) to find reflected point P'. In other words, turn your plane 180 degrees around the origin to move P onto P'.