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A comment on This SAT Math question got no correct submissions. Parent comment

Re:This SAT Math question got no correct submissions by wodenokoto on Monday July 06, 2015 @09:48PM (#9843208)
The animation shows 1 revolution for 1 rotation, but the text says its 2.

That is very confusing.

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Re:This SAT Math question got no correct submissions by nitwit005 on Monday July 06, 2015 @10:05PM (#9843258)
I was also confused by that until I changed my perspective. Watch the marker inside the circle.

It starts pointing left. Half way around the inner coin it's pointing left again. At the end it's pointing left once more.

That requires two rotations. The curve its graphing confuses things.

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