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Geometry Vocabulary

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
acute angle   angle measuring less than 90 degrees  
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angle   two rays connected by their endpoints  
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angle bisector   cuts an angle into congruent angles  
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collinear points   points that lie on the same line  
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congruent angles   angles that have the same measure  
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congruent segments   segments that have the same length  
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conjecture   conclusion reached by inductive reasoning  
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coordinate   a point's distance from the origin on the number line  
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coplanar   when points are on the same plane  
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counterexample   something that disproves a conjecture  
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inductive reasoning   reasoning based on observed patterns  
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line   a series of points that extend in two directions without end  
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midpoint   point that divides the segment into two congruent segments  
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obtuse angle   a angle that measures above 90 degrees and less than 180 degrees  
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opposite rays   rays that start at the same point but go in opposite directions  
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parallel lines   lines that lie on the same plane and do not intersect  
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perpendicular lines   lines that intersect from right angles  
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plane   a flat surface that has no thickness  
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point   has no size but has a position  
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postulate   an accepted statement of fact  
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ray   the part of a line consisting of one endpoint  
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right angle   an angle measuring 90 degrees  
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segment   the part of a line consisting of two endpoints  
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skew lines   noncoplanar lines that never intersect and are not parallel  
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space   the set of all points  
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plane   a flat surface that has no thickness  
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point   has no size but has a position  
🗑
postulate   an accepted statement of fact  
🗑
ray   the part of a line consisting of one endpoint  
🗑
right angle   an angle measuring 90 degrees  
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segment   the part of a line consisting of two endpoints  
🗑
skew lines   noncoplanar lines that never intersect and are not parallel  
🗑
space   the set of all points  
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