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Geometry Basic Vocab

Geometry The study of properties and relationships of points, lines, planes and solids.
Point Indicates place or position MUST BE IN CAPITAL LETTERS!
Line Set of points extending in both directions
Line Segment A set of points consisting of 2 points on a line called endpoints and all the points between these endpoints.
Congruent Segments Segments that have the same length
Midpoint The point of a segment that divides a segment into two congruent segments.
Bisector of a Line Segment Any line or subset of a line that intersects the segment at the midpoint. CUT IN HALF!
Ray Consists of an endpoint and all the points on that side
Opposite Rays Two rays of the same line that share the same and point and no other point.
Angle A union of 2 rays with one common endpoint
Straight Angle An angle that measures 180 degrees
Obtuse angle An angle that is greater than 90 degrees `
Acute angle An angle that is les than 90 degrees
Right angle An angle that is 90 degrees
Complementary angle 2 angles whose sum is 90 degrees
Supplementary angle 2 angles whose sum is 180 degrees
Angle bisector A ray whose endpoint is the vertex of the angle and that divides that angle into 2 congruent angles
Collinear A set of points that are on the same line
Betweeness B is between A and C if A,B,C are collinear and AB+BC=AC
Absolute value Distance from zero
Congruenr angles angles that have the same measure
Created by: Naylor