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terms for geometry

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
point   a specific place in space  
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line segment   `a part of a line  
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staight angle   an angle that measures 180  
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ray   Apart of a line that extends without end in one direction  
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angle   two rays that have the same end point  
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vertex   the point that two rays have in common  
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plane   a polygon with four points  
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acute triangle   an angle measuring less than 90 degrees  
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obtuse angles   angles measuring mor than 90 and less than 180 degrees  
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Created by: patgeorge
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