The Ask Dr. Math site in geometry contains definitions, solutions, and answers to frequently asked questions.
This site funded by the National Science Foundation helps teachers and students understand and appreciate mathematics connections.
The E-Z geometry site contains problems of the week, lessons, practice quizzes, and a geometry glossary.
This site was designed for high school geometry teachers and contains everything you want to know about the geometry of spheres.
Located on the Math Forum Project, the Geometry Problem of the Week contains archives, rules, help for teachers, and help for students.
This interactive version of Euclid's Elements contains thirteen books dealing with everything from circles to regular solids.
This site provides homework assistance in geometry and includes worksheets, word problems, study tips, and lessons.