Euclid's Elements
Uses Java Applets to illustrate and enhance interactive geometry
lessons. Superb site. All 13 books are on the site, making this
a complete geometry course. Free.
Formulas for Areas, Volumes, Surface Areas
List and illustrations.
Free Geometry Help
Browse our collection of geometry lessons: Area, Circles, Graphing Lines, Graphing Rational Functions, Slope of a Line.
Geodesic Club House
What good are equilateral triangles, you may ask? For building forts to hide out from siblings that's what!
The Geometry Center
Help learning geometry. Even has courses available.
Geometry - Math for Morons Like Us
Everything from parallel lines to volumes of prisms and a couple of word problems are covered.
Geometry Step by Step from the Land of the Incas
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.
The Golden Mean
The wonder of this number is that artists, mathematicians, architects and scientists have found it uniquely applicable to the
physical world. It establishes a singularly pleasing visual balance.
Height Site
How to make an Inclinometer to figure out the height of very tall objects or how high a kite or model rocket has gone.
You will use triangles to solve this.
High School Conic Sections, Circles
Stars indicate particularly interesting answers or good places to begin browsing.
How To Build A Bookcase
What homeschooling teen doesn't need another bookcase? Use what you've learned about geometry to make sure this case
is nice and square. From Popular Mechanics.
Lesson on Circumference of a Circle
The distance around a circle is called the circumference. The
distance across a circle through the center is called the diameter.
Pi is the ratio of the circumference of a circle to the diameter.
The Living Witch of Agnesi
This is a gif animation of the curve known as the 'Witch of Agnesi.'
It will cycle 5 times showing how the curve is defined graphically
using the formula y = a3/(x2 + a2)
Math.com Homework Help Geometry
Free math lessons and math homework help from basic math to algebra, geometry and beyond. Students, teachers, parents,
and everyone can find solutions to their math problems instantly.
Pythagorean Puzzle
Here's the deal; there was this Greek guy named Pythagoras,
who lived over 2,000 years ago during the sixth century B.C.E. Pythagoras spent a lot of time thinking about math, astronomy, and music.
Postulates, Theorems, and Corollaries from Geometry
List with links to proofs for each theorem.
Protractor
Janee made this lovely protractor for you to use on your computer for graphics projects. It could be printed on heavy paper
and used offline as well.
Quickie Math
This site can help a student in the wonderful world of Geometry. This site was made for students who wants to fill their hunger
to doing well in Geometry, friends that want to kill some time, or just a person who wants to learn about Geometry.
Science U's Geometry Center
Shapes, Patterns, Symmetry! You will find these themes everywhere in the Geometry Center. Browse through an exhibit,
or jump right in and start experimenting.
Webmath Geometry
Circles, Squares, Rectangles, Spheres, Cylinders, Boxes, Right triangles, Cones.