Geometry

» Areas, Volumes, Surface Areas
   Use these simple illustrated formulas to calculate volume and surface area of various shapes.

   
   http://math2.org/math/geometry/areasvols.htm

» Brain Teasers: Geometry Puzzles
   Slice and complete various figures to form requested shapes.

   
   http://brainden.com/geometry-puzzles.htm

» Cynthia Lanius' Lessons: Geometry Online
   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.

   
   http://math.rice.edu/~lanius/Geom/

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

   
   http://www.mathleague.com/help/geometry/polygons.htm

» Fugues of the Well-Tempered Clavier
   Interactive Director movie comparing a fugue by Johann Sebastian Bach to a Möbius strip.

   
   http://jan.ucc.nau.edu/~tas3/wtc/i10.html

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

   
   http://www.elvenkids.com/tools/geometria/Geometria.php

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

   
   http://www.mathleague.com/help/geometry/geometry.htm

» Geometry from the Land of the Incas
   Presents problems involving circles and triangles, with proofs, SAT practice quizzes and famous quotes. Also, has examples of geometry in Peruvian culture.

   
   http://agutie.homestead.com/

» Introduction to the Works of Euclid
   Covers the life of Euclid and a discussion of Euclidean geometry.

   
   http://www.obkb.com/dcljr/euclid.html

» Mad Maths
   Contains proposed mathematical theorems in a fun way.

   
   http://www.freewebs.com/maths88/

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

   
   http://pbskids.org/cyberchase/games/pointofview/pointofview.html

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

   
   http://pbskids.org/cyberchase/games/perimeterarea/perimeterarea.html

» Spaghetti and Meatballs For All
   Webquest for 3rd-8th graders comparing the perimeter and area of rectangles. Relates to the book "Spaghetti and Meatballs For All!" by Marilyn Burns.

   
   http://www.viterbo.edu/academic/ug/education/edu250/kljohnson/

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

   
   http://pbskids.org/sagwa/games/tangrams/index.html

» Teen Math Whizzes Go Euclid One Better
   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.

   
   http://jwilson.coe.uga.edu/Texts.Folder/GLaD/GLaD.Comments.html

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

   
   http://www.freewebs.com/abishek/

» The Pythagorean Theorem Lesson
   A lesson on the pythagorean theorem with the objective that the you will discover for yourself the actual theorem.

   
   http://www.arcytech.org/java/pythagoras/index.html

» Tim's Triangular Page
   Learn about the basic properties, formulas, theorems and different types of triangles. Includes proofs and illustrations.

   
   http://sakharov.net/triangle.html