Wolfram Research
Wolfram Math World: Transversal Line
MathWorld offers a brief definition of a transversal line provided by MathWorld.
Wolfram Research
Wolfram Math World: Perpendicular Lines
This site explains what perpendicular means geometricly in mathematics, gives reference to orthoginality, and explains notation for perpendicular segments or lines.
The Math League
The Math League: Basic Terms: Parallel Lines
This tutorial provides an explanation and example of parallel lines.
ClassFlow
Class Flow: Parallel Lines
[Free Registration/Login Required] This flipchart gives information and examples of the relationships of angles when parallel lines are cut by a transversal.
Free Math Help
Free Math Help: Defined Terms
The lesson discusses commonly used geometric terms. Definitions and examples of a line segment, ray, and angle are included.
Free Math Help
Free Math Help: Parallel Lines
The Geometry session explores parallel lines. Properties, definitions, and examples are included.
Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: Lines, Segments, and Rays
Find a quick, concise explanation of rays, lines and line segments. Examples are given and clearly explained for each.
ClassFlow
Class Flow: Geometry Line Vote
[Free Registration/Login Required] In this lesson the teacher will use geometry and spatial sense to distinguish between point, ray, line, line segment and angle. The students will review vocabulary for these terms and then...
ClassFlow
Class Flow: Lines, Rays, Line Segments
[Free Registration/Login Required] This lesson is an introduction to the basic geometric figures: lines, rays, and line segments. The definition and naming conventions for each figure are explained. An assessment section follows.
Math Is Fun
Math Is Fun: Parallel Lines
Students learn about parallel lines and pairs of angles. Definitions and examples are included.
Math Is Fun
Math Is Fun: Using a Ruler and Drafting Triangle
Students learn how to construct parallel and perpendicular lines. The resource consists of video demonstrations.
Shmoop University
Shmoop: Basic Geometry: Parallel Lines & Transversals
The geometry resource explores parallel lines and transversals. Descriptions, examples, and practice exercises are included.
City University of New York
Lehman College: An Introduction to Lines
Use this site for two short lesson plans regarding Euclidean and Spherical lines. Intersecting and parallel lines are discussed. The lesson contains activities for two days of class.
Varsity Tutors
Varsity Tutors: Hotmath: Congruent Line Segments
Find a quick, concise explanation of Congruent Line Segments. Several examples are given and clearly explained.
Free Math Help
Free Math Help: Length of a Line Segment
The resource explains how to calculate the length of a line segment by working out an example.
Integrated Publishing
Plane Figures
This site describes lines and angles "as found in various plane (flat) geometric figures.".
Quia
Quia: Spanish 2 Final Exam Review 2003
You can assess your knowledge of the various parts of angles and lines at this web site. You respond to a series of questions. A running total is visible showing the number of correct responses you have as you work your way through the...
University of Georgia
University of Georgia: Inter Math: Intersecting Lines
This site opens with a very simple definition of intersecting lines and has links to challenging problems, more information, related terms and everyday examples of intersecting lines.
University of Georgia
University of Georgia: Inter Math: Perpendicular Lines
This site from InterMath opens with a very simple definition of perpendicular lines and has links to challenging problems, more information, related terms and everyday examples of perpendicular lines.