# Shared Flashcard Set

## Details

Basic Geometry Terms
Vocabulary for Geometry
24
Mathematics
02/25/2010

Term
Definition
 a location in space without size/shape
Term
 Line
Definition
 an infinite number of points extending in opposite directions forever
Term
 plane
Definition
 at least 3 non-linear points that makes a 2 dimensional flat surface
Term
 line segment
Definition
 an infinite number of points that extents straight between 2 endpoints
Term
 ray
Definition
 an infinite number of points that extends from one point in one direction (straight) forever
Term
 angle
Definition
 2 rays that meet at a common endpoint called a vertex
Term
 right angle
Definition
 an angle that measures 90 degrees
Term
 Obtuse Angle
Definition
 An angle that measures greater than 90 degrees but less than 180 degrees
Term
 Straight Angle
Definition
 an angle that measures exactly 180 degrees
Term
 Complementary Angles
Definition
 2 angles whose sum measures 90 degrees
Term
 Supplementary Angles
Definition
 2 angles whose sum measures 180 degrees
Term
 vertex
Definition
 intersection where two lines, rays, line segments meet
Term
 acute angle
Definition
 an angle that measures less than 90 degrees but greater than 0 degrees
Term
 congruent
Definition
 to be equal in measure
Term
 bisect
Definition
 to cut something into 2 equal parts
Term
 parallel lines
Definition
 2 lines in the same plane that never intersect (railroad tracks)
Term
 transveral
Definition
 a line, ray, or line segment that crosses 2 or more other lines
Term
 vertical angles
Definition
 opposite angles that are created from 2 intersecting lines
Term
 alternate interior angles
Definition
 2 angles that are between 2 lines and on the opposite side of a transversal
Term
 corresponding angles
Definition
 2 angles that are on the same side of a transversal and one is inside a set of parallel lines and the other is outside the parallel lines
Term
 segment bisector
Definition
 a line that cuts a segment into 2 equal parts
Term
 perpendicular lines (orthogonal)
Definition
 2 lines that intersect at right angles
Term
 midpoint
Definition
 the point on line that is halfway between two endpoints
Term
 congruent segments
Definition
 2 segments that are equal in length
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