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Unit Plan
Integrated Publishing

Plane Figures

For Students 9th - 10th Standards
This site describes lines and angles "as found in various plane (flat) geometric figures.".
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Handout
The Math League

The Math League: Basic Terms: Parallel Lines

For Students 4th - 8th Standards
This tutorial provides an explanation and example of parallel lines.
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eBook
Math Planet

Math Planet: Geometry: Measure Line Segments

For Students 9th - 10th Standards
Explores how to measure the length of a line segment through examples and a video lesson. [0:40]
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Handout
Math Planet

Math Planet: Geometry: Measure and Classify an Angle

For Students 4th - 5th Standards
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]
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Lesson Plan
Oswego City School District

Regents Exam Prep Center: Intuitive Symmetry: Point, Line, Plane, Rotational

For Teachers 3rd - 8th Standards
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...
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Whiteboard
ClassFlow

Class Flow: Introduction to Geometry

For Teachers 9th - 10th
[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.
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Unit Plan
CK-12 Foundation

Ck 12: Geometry: Slope in the Coordinate Plane

For Students 9th - 10th Standards
[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.
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Unit Plan
CK-12 Foundation

Ck 12: Geometry: Segments From Secants and Tangents

For Students 9th - 10th
[Free Registration/Login may be required to access all resource tools.] This concept teaches students to solve for missing segments created by a tangent line and a secant line intersecting outside a circle.
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Unit Plan
CK-12 Foundation

Ck 12: Geometry: Same Side Interior Angles

For Students 9th - 10th
[Free Registration/Login may be required to access all resource tools.] Use same side interior angles to determine supplementary angles and the presence of parallel lines.
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Website
PBS

Pbs Learning Media: Finding the Intersection

For Students 6th - 8th Standards
In this Cyberchase video, Inez and Digit identify the location of the transformatron using their knowledge of parallel and intersecting lines.
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Handout
Wikimedia

Wikipedia: Hyperbolic Geometry

For Students 9th - 10th
This encyclopedia entry from Wikipedia offers a discussion on hyperbolic geometry. The site explains how the hyperbolic geometry plane is represented in two dimensions and how lines in the plane must be drawn. Other types of models for...
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Activity
Texas Instruments

Texas Instruments: Traveling Shapes Motion Geometry

For Teachers 6th - 8th Standards
In this activity, students describe how to move a shape from one place to another in a plane. They learn about translations, rotations, and line reflections. [Requires Adobe Reader.]
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Handout
CK-12 Foundation

Ck 12: Geometry: Properties of a Circle Study Guide

For Students 9th - 10th Standards
[Free Registration/Login may be required to access all resource tools.] This study guide reviews the terminology for circles (tangent, arcs, central angles) and the equation for a circle.
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Activity
Texas Instruments

Texas Instruments: Introduction to Geometry

For Teachers 9th - 10th Standards
These LearningCheck documents review basic geometric vocabulary, including transformations. It includes questions about the relationship between points lines and planes.
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Unit Plan
Cuemath

Cuemath: Tangent

For Students 9th - 10th Standards
Learn about the tangent definition in geometry, tangent geometry, tangent to a circle, tangent line equation. Check-out the solved examples for better understanding and try your hand at the tangent line calculator or solving a few...
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Unit Plan
CK-12 Foundation

Ck 12: Geometry: Basic Geometric Definitions

For Students 9th - 10th
[Free Registration/Login may be required to access all resource tools.] In this lesson students define and use geometric terms. Students examine guided notes, review guided practice, watch instructional videos and attempt practice problems.
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Lesson Plan
University of Regina (Canada)

University of Regina: Math Central: Introduction to Slope for Middle Years Mathematics

For Teachers 6th - 8th
This collection of five middle school math lessons covers the topic of plane geometry, specifically the concept of slope. The first lesson introduces students to plotting points on a Cartesian grid using a Geoboard. Lesson two moves them...
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Unit Plan
Math Is Fun

Math Is Fun: Line

For Students 2nd - 5th Standards
Find definitions and images of line, line segment, and ray.
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Activity
National Council of Teachers of Mathematics

The Math Forum: Analytic Geometry: Polar Coordinates

For Students 9th - 10th Standards
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...
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Website
PBS

Pbs Learning Media: Two Sightings, Different Information

For Students 5th - 7th
Jackie and Matt are looking at the same object along two different lines, in this video segment from Cyberchase.
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eBook
Math Planet

Math Planet: Geometry: Finding Distances and Midpoints

For Students 9th - 10th Standards
Discover how to find distances and midpoints by viewing examples and a video lesson. [1:07]
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eBook
Math Planet

Math Planet: Geometry: Polygons

For Students 9th - 10th Standards
A definition, examples, and a video lesson all help to explain polygons. [0:43]
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Website
Other

Central Michigan University: Point Slope Form

For Students 9th - 10th Standards
This resource features information on the point-slope form in geometry. It provides a good definition, several examples, and information on various forms.
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Handout
Free Math Help

Free Math Help: Geometry Vocabulary

For Students 9th - 10th Standards
The tutorial examines basic geometry vocabulary. Definitions and examples of a point, line, line segment, ray, and plane are included.