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Angles and Triangles

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
vertex   the point where two rays meet  
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right angle   an angle that measures exactly 90 degrees  
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acute angle   an angle that measures less than 90 degrees  
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obtuse angle   an angle that measures greater than 90 degrees  
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straight angle   an angle that measures exactly 180 degrees  
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vertical angles   opposite angles formed by the intersection of two lines  
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congruent   having the same measure  
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adjacent angles   angles that have the same vertex, share a common side, and do not overlap  
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complementary angles   two angles whose measures add up to 90 degrees  
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supplementary angles   two angles whose measures add up to 180 degrees  
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triangle   a geometric figure with three sides and three angles  
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acute triangle   a triangle whose angles all measure less than 90 degrees  
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right triangle   a triangle with one 90 degree angle  
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obtuse triangle   a triangle with one angle measuring greater than 90 degrees  
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scalene triangle   a triangle with no congruent sides  
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isosceles triangle   a triangle with at least two congruent sides  
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equilateral triangle   a triangle with three congruent sides  
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congruent segments   sides with the same length  
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Created by: Mrs. Hancock
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