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Geometry Terms

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
an exact location in space   point  
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a straight path that extends without end in opposite directions   line  
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a flat surface that extends forever   plane  
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a part of a line between two endpoints   segment  
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a part of a line that starts at one endpoint and extends forever   ray  
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an angle that measures 90 degrees   right angle  
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an angle that measures less than 90 degrees   acute angle  
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an angle that measures greater than 90 degrees but less than 180 degrees   obtuse angle  
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two angles whose measures add up to 90 degrees   complementary angles  
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two angles whose measures add up to 180 degrees   supplementary angles  
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having the same size and shape   congruent  
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a pair of opposite congruent angles formed by intersecting lines   vertical angles  
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lines in a plane that do not intersect   parallel lines  
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lines that intersect to form right angles   perpendicular lines  
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a line that intersects two or more lines   transversal  
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the theorem that states that the measures of the angles in a triangle add up to 180 degrees.   Triangle Sum Theorem  
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a triangle with all angles measuring less than 90 degrees   acute triangle  
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a triangle with one right angle   right triangle  
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a triangle with three congruent sides and three congruent angles   equilateral triangle  
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a triangle with at least two congruent sides and two congruent angles   isoceles triangle  
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a triangle with no congruent sides and no congruent angles   scalene triangle  
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a closed plane figure formed by three or more segments   polygon  
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a closed plane figure with sides and angles of equal measures   regular polygon  
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a quadrilateral with exactly one pair of parallel sides   trapezoid  
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a four sided polygon   quadrilateral  
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a quadrilateral with four right angles   rectangle  
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a quadrilateral with two pairs of parallel sides   parallelogram  
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a quadrilateral with four congruent sides   rhombus  
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a quadrilateral with four right angles and four congruent sides   square  
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a five sided polygon   pentagon  
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a six sided polygon   hexagon  
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an eight sided polygon   octogon  
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a quadrilateral with two adjacent sets of congruent sides   kite  
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