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I have to identify the next diagram. Can somebody please help with this!enter image description here

Thanks!

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closed as too localized by David Wallace, rschwieb, Asaf Karagila, Arkamis, Hagen von Eitzen Oct 25 '12 at 19:46

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1 Answer 1

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The answer is D. The circles go clockwise around the corners with a line that cuts through them. When the circle returns to the top left on the last diagram the line is rotated 90 degrees and so I assume that will happen when the line returns to the top right. Giving you D

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can you please explain what do you mean by "When the circle returns to the top left on the last diagram the line is rotated 90 degrees" –  Programmer Oct 25 '12 at 18:34
    
@Programmer: Perhaps a clearer way to describe what’s happening with the line is that it is rotated $135^\circ$ clockwise when the circle moves horizontally, and it does not change direction when the circle moves vertically. –  Brian M. Scott Oct 25 '12 at 19:45

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