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## Geometry for Secondary Math

## Links verified on 8/13/2014

- Cool Math: Geometry Information and Art - Get some good geometry and trigonometry information and see all the very cool art that can be made with math and geometry.
- Conjectures in Geometry: An educational web site created for high school geometry students. Their list of 20 conjectures in Geometry is supported by demonstrations using the Geometers Sketchpad.
- Davitily Math Problem Generator - add a title then select
Create Document, select add problems to select from four areas (Basic math, Algebra,Geometry, or SAT math), select from more specific menus, add the number of problems you want then select the grayBack tobutton to see a printable document. [online test not available in this free version].- The Fractal Microscope - Zoom in on the visually fascinating world of Mandelbrot and Julia sets, explore the algorithms used to create them, and learn about the mathematics behind the cool graphics. This is a Java version of the Fractal Microscope. You can also find a Java version of The Snowflake Fractal Generator -- Create your own fractals with this tool that allows you to specify a "drawing rule" that the computer uses to make curves like the famous Koch Snowflake. The same site offers the Sierpinski Gasket -- A tool for modeling the "Chaos Game', a simple, apparently random process with a not-so-random result. Allows you to change the rules and make your own fractals.
- Fractals - a list of links from Math Archives
- The Geometry Center offers activities in the following areas: Triangle Tilings and Polyhedra, Symmetry and Tiling and Tetrahedral Puzzles.
- Geometry from the Land of the Incas - Problems, theorems, proofs, quizzes and more
- Geometry Help - a variety of help topics are available
- Geometry Junkyard has links to what must be every single geometry page on the entire web.
- Geometry Through Art: a Lesson on Teaching Measurement by Norman Shapiro. Egyptian knotted string - Use plain kite string and bring geometry into your math program. You might also check out the lesson on Exploring Geometry by Making Drawings and the sample lesson about The Square. Each of the activities referred to here came from Shapiro's What Children Can Learn about Art and Geometry.
Java Script math applets|| Trigonometry || Calculus || Complex number || Conics || Miscellaneous | [These expired links are available through the Wayback Machine Internet Archive. If the pages don't load quickly click on Impatient? at the bottom right of the page.]- Khan Academy - [video lessons] a library of over 3,000 videos covering everything from arithmetic to physics, finance, and history and 315 practice exercises
- Learning Math - Geometry - a course designed to teach mathematics content to teachers
- Math Art - A WebQuest combining the fields of art and geometry [This expired link is available through the Wayback Machine Internet Archive. If the page doesn't load quickly click on Impatient? at the bottom right of the page.]
- Mathematics for Morons Like Us (Geometry) - After each section, there is an optional quiz that you can take to see if you've fully mastered the concepts [This expired link is available through the Wayback Machine Internet Archive. If the page doesn't load quickly click on Impatient? at the bottom right of the page.]
- Number Patterns Fun with Curves & Topology
- Paperfolding.com has a page regarding Origami and Mathematics. [This expired link is available through the Wayback Machine Internet Archive. If the page doesn't load quickly click on Impatient? at the bottom right of the page.] Along the same lines you might want to check Joseph Wu's Origami Page.
Patterns in Math- Jill Britton, mathematics instructor at Camosun College, Victoria, BC in Canada has a fantastic set of links related to Investigating Patterns. If you find these useful in your classroom you might also check out Escher in the Classroom or Tessellated Polyhedra.- Polyhedra Pastimes - activity links [25 pages if printed]
- Pythagorean Theorem Interactive - [Free activity provided by a commercial site] Learn that the Pythagorean Theorem describes the relationship between the lengths of the sides of a right triangle. Discover visual and algebraic proofs. Apply the Pythagorean Formula to find missing side lengths. Derive the distance formula for points in the coordinate plane.
- Symmetry and Tessellations - activity links [34 pages if printed]
- Virtual Manipulatives: Geometry - [grades 9-12] from the National Library of Virtual Manipulatives
- Web Math: Plots and Geometry Help - Quick help on a variety of topics

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