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Mathematics 14 Online
OpenStudy (excalibur0126):

Which of the following three-dimensional objects has rotational symmetry about a line? A. a car B. a set of rectangular stairs C. a rolling pin D. a stapler

Vocaloid (vocaloid):

I believe it would be a rolling pin, since a rolling pin looks the same after you rotate it (if you're looking at it from the top)

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