SOLUTION: How do you find the angle of rotation in rotational symmetry of an object?

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Question 448269: How do you find the angle of rotation in rotational symmetry of an object?
Answer by jim_thompson5910(35256) About Me  (Show Source):
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If you know the center of rotation and the lengths of the segments that join the center to the vertices of the object, then you can use some trigonometry to find the angle of rotation. This all depends on the object, where it's located, and where the center of rotation is located.