Geometry and math formulas, software, and games.

Use these simple illustrated formulas to calculate volume and surface area of various shapes.

Have fun learning through activities about polygons, triangles, circles, and the volume of cylinders. Page includes an historic timeline, SAT type quiz, and glossary of terms.

Shows different types of straight-sided shapes with up to ten sides. Gives the total number of degrees for each side.

Interactive Director movie comparing a fugue by Johann Sebastian Bach to a Möbius strip.

A program for computing lines, surfaces and volumes of the main plane and solid figures, through direct and indirect formulas. Includes multiple languages.

Explains and describes geometric terms, measurement of angles, types of figures, coordinate graphs, areas and volumes.

Games, illustrations, and definitions.

Presents problems involving circles and triangles, with proofs, SAT practice quizzes and famous quotes. Also, has examples of geometry in Peruvian culture.

Covers the life of Euclid and a discussion of Euclidean geometry.

Use visualization to determine how four different people see a set of 3-D blocks. From PBS Kids.

Use a virtual geoboard to help Dr. Marbles design a new fleet of cyberspace ships. From PBS Kids.

Choose a puzzle, then click and drag virtual tangram pieces to solve it. From PBS.

Features a discussion about the works of two teenagers, David Goldenheim and Daniel Litchfieldm, from Connecticut. They helped find a solution that eluded Euclid in finding a method to partition a line into any number of equal sections.

The history, uses,and creator of pi and also some fun facts, jokes and songs.

A lesson on the pythagorean theorem with the objective that the you will discover for yourself the actual theorem.

Learn about the basic properties, formulas, theorems and different types of triangles. Includes proofs and illustrations.