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Mathematics 17 Online
OpenStudy (anonymous):

An irregular parallelogram rotates 360° about the midpoint of its diagonal. How many times does the image of the parallelogram coincide with its preimage during the rotation? a. 2 b. 4 c. 6 d. 8

OpenStudy (mathstudent55):

Take a piece of paper. Fold it or cut the corners to make an irregular parallelogram and rotate it. Then count.

OpenStudy (elonasushchik):

So its going to be A @n1205

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