# Shared Flashcard Set

## Details

Geometry Concepts
Geometry Concepts to review before 9th grade
13
Mathematics
05/03/2011

Term
 Colinear
Definition
 Lying in one line (usually refers to a set of points
Term
 Congruent
Definition
 Of exactly the same size and shape; in other words, of exactly the same dimensions.
Term
 Coplanar
Definition
 Existing in one plane (usually refers to points or lines
Term
 Dimension
Definition
 The number of lines required to span a region in space
Term
 Line
Definition
 A collection of points arrayed in a straight formation without limit
Term
 Noncolinear
Definition
 Not lying in one line (usually refers to a set of points).
Term
 Noncoplanar
Definition
 Not existing in one plane (usually refers to points or lines
Term
 Perpendicular
Definition
 At a 90 degree angle (something is perpendicular relative to something else).
Term
 Plane
Definition
 A flat, boundless surface in space
Term
 Point
Definition
 A specific location in space
Term
 Ray
Definition
 A portion of a line with a fixed endpoint on one end that extends without bound in the other direction.
Term
 Segment
Definition
 A portion of a line with two endpoints and, thus, finite length
Term
 Space
Definition
 The collection of all points.
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