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polygon terms

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
opposite sides parallel and all sides the same length, four 90 degree angles   square  
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opposite sides parallel, four 90 degree angles   rectangle  
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3 sides   triangle  
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triangle with all sides equal   equilateral  
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triangle with at least two equal sides   isosceles  
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triangle with NO equal sides   scalene  
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triangle with one angle greater than 90 degrees   obtuse  
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triangle with all angles less than 90 degrees   acute  
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triangle with one angle exactly equal to 90 degrees   right  
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Created by: cseals
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