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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
Coplanar   Lie on same plane  
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Collinear   Lie on same line  
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Ray   Consists of an endpoint  
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Segment   Part of the line that consists of two points called endpoints  
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Line   Has one dimension and extends in two directions.  
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Non-Collinear   Doesn't lie on same line  
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Non-Coplanar   Doesn't lie on same plane  
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Congruent≅   same size or same shape  
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angles   consists of two rays with the same endpoint  
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postulate   statement that is assumed to be true  
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Conjecture   an unproven statement  
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Counterexample   shows the conjecture is wrong  
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vertex   A point where a line meets  
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plane   has two dimensions  
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intersection   the intersection of two points that the figures have in common  
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acute   Less than 90°  
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Obtuse   More than 90°  
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Right   Exactly 90°  
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Straight   180°  
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Created by: jaredringer24
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