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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
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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/
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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
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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
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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
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Geometry
Games, illustrations, and definitions.
http://www.coolmath4kids.com/geometrystuff.html
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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
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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/
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Introduction to the Works of Euclid
Covers the life of Euclid and a discussion of Euclidean geometry.
http://www.obkb.com/dcljr/euclid.html
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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
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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
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Tangrams
Choose a puzzle, then click and drag virtual tangram pieces to solve it. From PBS.
http://pbskids.org/sagwa/games/tangrams/index.html
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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
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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
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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
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