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A (not necessarily convex) 11-sided polygon can have at most how many right interior angles? Be sure to explain why an 11-sided polygon can have that number of right interior angles, and why it can’t have any more than that. Please help!

 Feb 25, 2021
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The sum of external angles of any polygon is 360 degrees. Having a right angle contribues 90 degrees to the external angles, so there can only be a maximum of right angles. (if there were 4, there wouldn't be room for any more angles)

 Feb 25, 2021

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