# Shared Flashcard Set

## Details

Geometry Ch.1
39
Mathematics
10/18/2012

Term
 Point
Definition
 A point is an exact location. [image]
Term
 Line
Definition
 A line never-ending straight path. [image]
Term
 Segment
Definition
 Segment: Part of a line containing two endpoints and all the points between them.[image] [image]
Term
 Ray
Definition
 Ray: A part of a line that extends indefinitely in one direction from a fixed point. [image]
Term
 Plane
Definition
 Plane: A two-dimensional flat surface that extends in all directions. [image]
Term
 Opposite rays
Definition
 Opposite Rays : Two rays that are part of the same line and have only their endpoints in common.  [image]
Term
 Collinear
Definition
 Collinear: Three or more points that lie on the same line. [image]
Term
 Coplanar
Definition
 Coplanar: Points or lines that lie in the same plane. [image]
Term
 Angle
Definition
 Angle: A figure formed by two rays with a common endpoint. [image]
Term
 Midpoint
Definition
 Midpoint: On a line segment, the point that is halfway between the endpoints. [image]
Term
 Bisector
Definition
 Bisector: A ray that separates a given angle into two angles with equal measure. [image]
Term
 Congruent
Definition
 Congruent: Having the same measure. [image]
Term
 Vertex
Definition
 Vertex: The common endpoint of the rays forming the angle. [image]
Term
 Acute angles
Definition
 Acute Angle: An angle with a measure greater than 0° and less than 90°. [image]
Term
 Obtuse angles
Definition
 Obtuse Angle: An angle that measures more than 90° but less than 180°. [image]
Term
 Right angle
Definition
 Right Angle: An angle that measures exactly 90°. [image]
Term
 Straight angle
Definition
 Straight Angle: An angle that measures 180°. [image]
Term
 Complementary angles
Definition
 Complementary Angles: Two angles are complementary if the sum of their measures is 90°. [image][image]
Term
 Supplementary angles
Definition
 Supplementary Angles: Two angles are supplementary if the sum of their measures is 180°. [image]
Term
 Vertical angles
Definition
 Vertical Angles: Opposite angles formed by the intersection of two lines. [image]
Term
Definition
 Adjacent Angles: Angles that have the same vertex, share a common side, and do not overlap. [image]
Term
 Linear pair
Definition
 Linear Pair: two angles that are adjacent whose angles add up to 180. [image]
Term
 Perpendicular lines
Definition
 Perpendicular Lines: Lines which meet to form right angles and whose slopes have a product of -1. [image]
Term
 Polygon
Definition
 Polygon: A simple closed figure in a plane formed by three or more line segments. [image]
Term
 Convex
Definition
 Convex: A polygon for which all diagonals are located in the interior of the polygon. [image]
Term
 Concave
Definition
 Concave: A polygon for which a point on at least one of its diagonals lies outside the polygon.  [image]
Term
 Regular Polygon
Definition
 Regular Polygon: A polygon that has all sides congruent and all angles congruent. [image]
Term
 Irregular Polygon
Definition
 Irregular Polygon: A polygon that has all sides aren't congruent and all angles aren't congruent. [image]
Term
 Diagonal
Definition
 Diagonal: A segment joining two nonconsecutive vertices of a polygon. [image]
Term
 Side
Definition
 Side: The segments that form a closed figure. [image]
Term
 Perimeter
Definition
 Perimeter: The distance around a closed geometric figure. [image]
Term
 Polygon-Triangle
Definition
 Triangle: A polygon having three sides. [image]
Term
Definition
 Quadrillateral: A polygon having four sides. [image]
Term
 Polygon-Pentagon
Definition
 Pentagon: A plane figure with five straight sides and five angles [image]
Term
 Polygon-Hexagon
Definition
 Hexagon: A plane figure with six straight sides and angles. [image]
Term
 Polygon-Ocatgon
Definition
 Octagon: A plane figure with eight straight sides and eight angles.
Term
 Polygon-Decagon
Definition
 Decagon: A plane figure with ten straight sides and angles. [image]
Term
 Polygon-Dodecagon
Definition
 Dodecagon: A plane figure with twelve sides. [image]
Term
 Polygon- n-gon
Definition
 N-gon: a term where n is the number of the polygon's sides, also it could be used to name a polygon. For example, a polygon with 15 sides is a 15- gon. [image]
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