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Revision of into to geometry concepts in prep for Christmas tests

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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Term
Definition
Point of intersection   Where 2 or more lines, line segments or rays meet or cross  
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Collinear points   Points that lie on the same line  
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Vertex   Point where 2 rays meet to form an angle  
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Acute angle   Angle of less than 90 degrees  
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Right angle   Angle of 90 degrees  
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Obtuse angle   Angle greater than 90 but less than 180 degrees  
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Straight angle   Angle of 180 degrees  
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Reflex angle   Angle greater than 180 but less than 360 degrees  
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Full angle   Angle of 360 degrees  
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Null angle   Angle of 0 degrees  
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Ordinary angle   Angle less than 180 degrees  
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Supplementary angles   2 angles that sum to 180 degrees  
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Perpendicular lines   Lines that meet at right angles to each other  
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Parallel lines   Lines that are equal distance apart and never meet  
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Bisector   Line that cuts an angle into 2 equal parts  
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Created by: Ms McEntee
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