Math Planet
Math Planet: An Introduction to Geometry
Provides an introduction to geometry with definitions of points, lines, planes and angles through the use of examples and a brief video lesson. [1:28]
Oswego City School District
Regents Exam Prep Center: Lines and Planes
Use these resources in preparing instruction on undefined terms (points, lines, and planes), theorems relating lines and planes, and Euclidean and non-Euclidean geometry. You'll find three lessons on the aforementioned subject areas, an...
Math Planet
Math Planet: Geometry: Measure Line Segments
Explores how to measure the length of a line segment through examples and a video lesson. [0:40]
Wolfram Research
Wolfram Math World: Geometry
This MathWorld tutorial provides detailed overviews of the concepts and theorems associated with geometry. Most of the Math World sites are extensive and some require higher math knowledge to understand, links to terms and topics are...
Oswego City School District
Regents Exam Prep Center: Intuitive Symmetry: Point, Line, Plane, Rotational
Investigate the concept of symmetry at this test prep site. See detailed definitions and picture examples, answer the questions in the interactive practice pages, and do the classroom activity where students use a digital camera to...
ClassFlow
Class Flow: Introduction to Geometry
[Free Registration/Login Required] This flipchart is a basic introduction to Geometry: points, lines and planes. The flipchart contains movable objects (with an emphasis on student participation) and Activotes.
CK-12 Foundation
Ck 12: Geometry: Basic Geometric Definitions
[Free Registration/Login may be required to access all resource tools.] This concept introduces students to the basic principles and definitions of geometry, including points, lines and planes. tudents examine guided notes, review guided...
Math Open Reference
Math Open Reference: Points and Lines
A complete reference guide to points, lines, and planes. It provides definitions and interactive activities that enhance further explanation.
ClassFlow
Class Flow: Plane Geometry
[Free Registration/Login Required] This is an introduction or review lesson on points, lines, planes and angles using some of the tools for Activstudio 2.
Oswego City School District
Regents Exam Prep Center: Geometry Vocabulary Resources
A list of geometry definitions and a matching activity.
Math Planet
Math Planet: Geometry: Measure and Classify an Angle
Explains the terms and symbols used to discuss line angles, what an angle is, and the types of angles. Includes short video lesson demonstrating how to use a protractor to measure an angle. [0:57]
CK-12 Foundation
Ck 12: Geometry: Slope in the Coordinate Plane
[Free Registration/Login may be required to access all resource tools.] This concept reviews how to calculate the slope of a line given two points on the line.
PBS
Pbs Learning Media: Two Points Determine a Line
In this video segment [2:10] from Cyberchase, Digit must make a straight line between the two points and then follow the path created.
Oswego City School District
Regents Exam Prep Center: Length of a Line Segment (Distance)
Use the coordinate plane and Pythagorean theorem to determine the length of a line segment. Click on the "Topic Index" to find a related practice exercise and teacher resource.
Texas Instruments
Texas Instruments: Introduction to Geometry
These LearningCheck documents review basic geometric vocabulary, including transformations. It includes questions about the relationship between points lines and planes.
Math.com
Math.com: Coordinate Geometry
The lesson investigates coordinate geometry. Definitions, examples, and a worksheet are available.
CK-12 Foundation
Ck 12: Geometry: Slope in the Coordinate Plane
[Free Registration/Login may be required to access all resource tools.] Find the slope of a line given two points. Includes a video [5 min. 29 sec.], examples, and review problems along with an answer key.
PBS
Pbs Learning Media: Finding the Intersection
In this Cyberchase video, Inez and Digit identify the location of the transformatron using their knowledge of parallel and intersecting lines.
Math Planet
Math Planet: Geometry: Finding Distances and Midpoints
Discover how to find distances and midpoints by viewing examples and a video lesson. [1:07]
Math Planet
Math Planet: Geometry: Polygons
A definition, examples, and a video lesson all help to explain polygons. [0:43]
ClassFlow
Class Flow: Basic Geometry Vocabulary
[Free Registration/Login Required] This flipchart is an introduction to geometry vocabulary and elementary geometric figures. Activities ask students to match vocabulary and definitions and label figures. Assessment questions follow.
CK-12 Foundation
Ck 12: Geometry: Basic Geometric Definitions
[Free Registration/Login may be required to access all resource tools.] In this lesson students identify points, rays, lines, and line segments. Students examine guided notes, review guided practice, watch instructional videos and...
University of Regina (Canada)
University of Regina: Math Central: Introduction to Slope for Middle Years Mathematics
This collection of five middle school math lessons covers the topic of plane geometry, specifically the concept of slope. The first activity introduces learners to plotting points on a Cartesian grid using a Geoboard. Lesson two moves...
National Council of Teachers of Mathematics
The Math Forum: Analytic Geometry: Polar Coordinates
This site from The Math Forum provides great information on polar coordinates. You can access this information either by clicking on the coordinates link or just scrolling down, it is the first one listed on the page. Includes several...