# Shared Flashcard Set

## Details

Chapter 15
Identify and Describe Geometric Figures
26
Mathematics
01/27/2012

Term
 parallel
Definition
 lines that lie in the same plane and do not intersect; they are always the same distance apart
Term
 perpendicular
Definition
 line segments that cross or meet to form right angles
Term
 intersecting
Definition
 lines that meet or cross at a common point
Term
 ray
Definition
 part of a line; it has one endpoint and goes on without end in one direction
Term
 angle
Definition
 formed by two rays with a common endpoint
Term
 vertex
Definition
 the common endpoint of two rays that form an angle
Term
 right angle
Definition
 an angle that forms a square corner
Term
 obtuse angle
Definition
 an angle that is greater than a right angle
Term
 acute angle
Definition
 an angle that is less than a right angle
Term
 polygon
Definition
 a flat, closed figure made up of three or more line segments
Term
Definition
 a four sided polygon
Term
 trapezoid
Definition
 a quadrilateral with only one pair of parallel sides
Term
 pentagon
Definition
 a five sided polygon
Term
 octagon
Definition
 an eight sided polygon
Term
 vertex or vertices
Definition
 the point where two sides of a polygon meet
Term
 two-dimensional figure
Definition
 a shape that has length and width
Term
 side
Definition
 one of the line segments that makes a polygon
Term
 rhombus
Definition
 a parallelogram with all four sides the same length
Term
 parallelogram
Definition
 a quadrilateral with four sides where the opposite sides are parallel
Term
 hexagon
Definition
 a six sided polygon
Term
 acute triangle
Definition
 triangle with all angles acute
Term
 right triangle
Definition
 triangle with one right angle
Term
 obtuse triangle
Definition
 triangle with one obtuse angle
Term
 equilateral triangle
Definition
 triangle with all sides the same and all angles the same
Term
 isosceles triangle
Definition
 triangle with 2 sides the same and 2 angles the same
Term
 scalene triangle
Definition
 triangle with no sides the same and no angles the same
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