The purpose of this task is to explore reflections in the context of paper folding. Each fold is associated with a line of reflection and understanding each step in the construction requires careful analysis of angles and of the...

Explore the world of congruence in this mini-lesson. Provides a definition and examples that help with understanding its properties.

The Chinese character mark formerly known as "Tan" is the first of two lessons to introduce first grade young scholars to geometry using tangrams. This lesson incorporates history, math, and language arts. In this lesson students will be...

Discovering the properties of constructions, seeing proofs in action, and viewing problems come to life here with this wonderful use of technology in the classroom. Single steps are explained and illustrated one at a time so that the...

This site from the Rice University provides a Fractals Unit for Elementary and Middle School Students. Find out what a fractal is and what it looks like. You can value fractals for their visual delight or mathmatical properties. This is...

This lesson has links to the various topics dealing with calculus. The student just needs to find the topic then click to go to it.

A collection of information on the science of light and optics. Features a wide variety of resources: key events in history, reference materials, multimedia links, optical illusion activities, glossary of optics terms, and information on...

Based on building a hexagon, this activity from the Math Forum collection focuses on using different combinations of pattern blocks to create a hexagon. An online activity, pencil and paper method, literature connections, and a...

A complete reference guide to polygons. It provides definitions, examples, and an interactive activity that enhances further explanation. Includes links to related topics.

[Free Registration/Login Required] In this flip chart, students apply geometric sense by using the properties of two-dimensional and three-dimensional shapes to solve mathematical problems involving area and volume.

On this one page website sharpen your logic, triangle properties, and pattern recognition skills while working on this challenge. The solution is available to double check your solution.

This is a proof problem, considered a "three star" geometry problem requiring knowledge of proofs and properties of circles to solve this problem with cables in duct problem.

This is a "three star" geometry problem requiring knowledge of proofs and properties of circles. Students will use the given definition of radical axis and prior knowledges to prove a way to find a radical axis.

[Free Registration/Login Required] In this flipchart, students develop an understanding of the properties of a sphere and determine its area and volume.

Are you looking for a very basic website that will explain the basic properties of a triangle? Use this site to learn about the properties of equilateral triangles, isosceles triangles, right triangles,and scalene triangles. There are...

You will enjoy this shape game. It tells you the name of a shape and all you have to do is click on the correct shape. If you get confused you can have another try.

Sharpen your logic and and pattern recognition skills with this four triangles puzzle. The solution is available to check your work.

The challenge at this one page website, is to see how many trapezoids (British-trapeziums) you can find in the figure. When you have your results, you can easily check it right at the website.

This site from the Richland Community College provides the detailed lecture notes to a college algebra course, complete with equations and definitions. Content ranges from "functions and their graphs" to "conics and parametric equations."

This tutorial features templates and instructions to make the following solids: tetrahedron, cube, octahedron, dodecahedron, and icosahedron.

Develop problem solving skills working with pentagons and then check your results.

Classify shapes based on pictures or attributes, such as angle types and side-lengths. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.

Students will use their knowledge of plane figure attributes to create and view shapes by cutting and rotating shapes to stimulate discussions on names and attributes of various shapes they do not regularly encounter.

In Spanish. In this interactive session you will study the second order determinant and its properties. Both methods geometrically and algebraically are presented.