# Shared Flashcard Set

## Details

Geometry Terms (Chapter 15)
Geometry termms
34
Mathematics
01/22/2008

Term
 line
Definition
 a straight path without end in two directions
Term
 line segment
Definition
 part of a line with two endpoints
Term
 ray
Definition
 part of a line. It has one endpoint. It also goes on without end in one direction.
Term
 angle
Definition
 formed by two rays with the same endpoint.
Term
 right angle
Definition
 an angle that has a square corner. It measures 90 degrees.
Term
 acute angle
Definition
 less than a right angle
Term
 obtuse angle
Definition
 more than a right angle
Term
 parallel lines
Definition
 lines that are the same distance apar
Term
 intersecting lines
Definition
 lines that cross at a common point
Term
 perpendicular lines
Definition
 lines that cross at a right angle
Term
 plane figure
Definition
 flat figures. They can be closed or not closed
Term
 polygon
Definition
 are closed figures that have three or more line segments
Term
 side
Definition
 each line in a polygon
Term
 vertex
Definition
 point where to sides meet
Term
 triangle
Definition
 3 sides
Term
 square
Definition
 "4 sides, 4 equal sides, 4 right angles, opposite sides parallel"
Term
 rectangle
Definition
 "4 sides, 4 right angles, opposite sides parallel"
Term
 pentagon
Definition
 5 sides
Term
 hexagons
Definition
 6 sides
Term
 octagons
Definition
 8 sides
Term
 regular polygon
Definition
 have all sides and angles the same
Term
 irregular polygon
Definition
 sides and angles can be different sizes.
Term
Definition
 "4 sides, 4 angles"
Term
 Paralleogram
Definition
 "4 sides, 4 angles, opposite sides are parallel"
Term
 diagonal
Definition
 connects two vertices of a polygon that are not next to each other
Term
 equalateral triangle
Definition
 all of the sides have equal lengths
Term
 isosceles triangle
Definition
 two sides have equal lengths
Term
 right triangle
Definition
 one angle is a right angle
Term
 scalene triangle
Definition
 each side is a different length
Term
 solid figures
Definition
 "3 dimensional, not flat like plane figures"
Term
 complex solid figure
Definition
 made up of more than one or two solid shapes
Term
 vertex (solid figures)
Definition
 a point where edges meet.
Term
 face
Definition
 a flat surface of a solid figure
Term
 edge
Definition
 is formed when two faces meet
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