Geometry - Basic terms, angles and angle term, figures and polygons, area and perimeter, coordinates and similar figures, space figures and basic solids.
AAAMath.Com: Geometry Page - These pages teach geometry facts covered in K8 math courses. Each page has an explanation, interactive practice and challenge games about geometry.
Geometry from the Land of the Incas. Problems, theorems, proofs, quizzes, with animations. - It provides an eclectic mix of sound, science, and Incan history intended to interest students in Euclidean geometry. The site includes geometry problems, proofs, quizzes, puzzles, quotations, scientific speculation, and more.
StudyWorks! Online: Interactive Geometry - The activities in this section will help you get a "hands-on" feel for some of the fundamental principles of geometry. Try them all to help understand theorems and proofs.
Geometry in Motion - This site provides direct interaction with geometric diagrams, courtesy of Java Sketchpad.
softSurfer.com: Geometry Algorithms - Dan Sunday's Geometry Algorithms web site. Here you will find resources for developing geometry algorithm and computer graphics software. Whether you're just interested in learning about this class of algorithms, or have a real problem to solve, we may have what you need. Look around.
Computational Geometry Resources - Other indexes include Jeff Erickson's essential Computational Geometry Pages, and David Eppstein's useful Geometry in Action (and his wonderful Geometry Junkyard). There's also Hervé Bronnimann's CG Tribune WWW Sites, Fachgruppe 0.1.2's Interesting Stuff from the Range of Algorithmic Geometry, Curtin's Other Sites Relating to Computational Geometry, and Guilherme Albuquerque Pinto's Computational Geometry on the WWW.
Math.com: Homework Help Geometry - Geometry Building Blocks: Geometry words, Coordinates geometry, Pairs of lines, Classifying angles, Angles and intersecting lines, Circles, etc.
Math Archives - Topics in Mathematics.
Shape and Space in Geometry - Geometry is the mathematics of shape and space. It's about the properties of objects (their angles and surfaces, for instance) and the consequences of how these objects are positioned (where their shadows fall, how people must move around them).
Projective Geometry - Projective geometry is a beautiful subject which has some remarkable applications beyond those in standard textbooks. These were pointed to by Rudolf Steiner who sought an exact way of working scientifically with aspects of reality which cannot be described in terms of ordinary physical measurements. His colleague George Adams worked out much of this and pointed the way to some remarkable research done by Lawrence Edwards in recent years. Steiner's spiritual research showed that there is another kind of space in which more subtle aspects of reality such as life processes take place. Adams took his descriptions of how this space is experienced and found a way of specifying it geometrically, which is dealt with in the Counter Space Page.