Shodor Education Foundation
Shodor Interactivate: Lesson: Lines, Rays, Line Segments, & Planes
This robust lesson plan for upper elementary and middle school grades introduces the concepts for lines, rays, line segments, and planes. Resources are linked to it and ready for your use.
Math Open Reference
Math Open Reference: Line Segment
Learn about line segments with this useful reference guide. Provides a detailed definition, examples, and an interactive activity that enhances further explanation. Includes links to related topics.
CK-12 Foundation
Ck 12: Interactive Geometry: 10.6 Points That Partition Line Segments
Understand points that partition line segments.
CK-12 Foundation
Ck 12: Interactive Geometry: 5.2 Bisectors of Line Segments and Angles
Learn how to construct bisectors of line segments and angles.
Mathigon
Mathigon: Geometry: Euclidean Geometry: Definitions
This lesson focuses on Euclidean Geometry terminology; such as line, point, line segment, congruence, circle, radius, ray, and more. It defines each term and provides an example of each.
Mr. Martini's Classroom
Mr. Martini's Classroom: Basic Geometry: Points, Lines, and Angles
Students can review basic geometric terms using these self-check, multiple choice questions. Three levels of questions are provided.
Math Planet
Math Planet: Pre Algebra: Geometry Fundamental Statements
Provides examples and a video lesson that introduce fundamental statements of geometry.
Khan Academy
Khan Academy: Divide Line Segments
Figure out the coordinates of a point between two other points that give a certain ratio. For example, find a point C so that it is two thirds of the way between point A and B.
CK-12 Foundation
Ck 12: Geometry: Segments Study Guide
[Free Registration/Login may be required to access all resource tools.] This study guide reviews how to measure the distance between two points and the Ruler Postulate. It also introduces congruency/congruent segments and midpoint.
PBS
Pbs Learning Media: Patterns in Nature
In this video segment [3:25] from Cyberchase, a plant expert shows Bianca the patterns and symmetry found in nature.
Oswego City School District
Regents Exam Prep Center: Midpoint of a Line Segment
Examples for using the midpoint formula are given at this site.