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Geometry Pad is a dynamic geometry application for iPad.  With the Geometry Pad you can create fundamental geometric shapes, explore and change their properties and calculate metrics. The shapes are displayed on a scrollable and zoomable workbook with a rectangular coordinate system. The following tools are built into the application:  - Move and scale. Scroll the workbook by your finger. Pinch and zoom the content of your workbook. Move and modify shapes.  - Point. Plot a point on the workbook. Customize point name and color.  - Line. Create a line. Customize line style, color and start/end points. Calculate line length (distance between points).  - Midpoint for lines. Show/hide midpoint for lines and polygon sides. Snap to midpoints.  - Parallel, perpendicular and tangent lines. The lines can be created as easily as regular lines. Just create and move the line until it automatically snaps to parallel, perpendicular or tangent.  - Angle. Create an angle with up to 1 degree precision. Customize angle line style and color.  - Triangle. Create a triangle of one of the predefined types: regular, right triangle, isosceles, equilateral. Customize sides style and color. Calculate triangle perimeter and area. Calculate inner angles of the triangle and length of its sides.  - Triangle lines. Create altitude, bisector and median lines in a triangle. Calculate length of triangle lines. Customize lines style and color.  - Quadrilateral. Create a quadrilateral of one of the predefined types: regular, square, rectangle, parallelogram, rhombus. Customize sides style and color. Calculate quadrilateral perimeter and area. Calculate inner angles of the quadrilateral and length of its sides.  - Circle. Create a circle. Calculate circle perimeter and area. Easily create circles inscribed into a triangle by placing circle's center close enough to the incenter of a triangle.  - Circle radius and chord. Create radius and chord lines for a circle. Customize lines style and c

CK-12 Foundation's Geometry FlexBook is a clear presentation of the essentials of geometry for the high school student. Topics include: Proof, Congruent Triangles, Quadrilaterals, Similarity, Perimeter & Area, Volume, and Transformations.

This slide show demonstrates some techniques that would be suitable for an experimental geometry project. The basic shapes of square and circle are explored using open source Geogebra and Dr Geo geometry software. The examples includes exercises in geometric construction, novel solutions and recursive (spiral) constructions. This is mathematics that can be done without algebra. There is some algebra on slide 18, to calculate the radius and area of a semicircle inscribed in a square.

A great site for free worksheets for geometry. Also other math courses

Informal Geometry comes to us through MathMastery -- November's Featured Partner. This video-rich content provides students with the concepts and skills necessary for finding the perimeter, area, surface area and volume of common geometric figures; graphing equations on the coordinate system and deriving the equation for the third line from a pair of points; using the Pythagorean Theorem to solve problems involving right triangles; determining if triangles are similar and finding an unknown side in similar triangles; and determining unknown angles in figures by calculating the sum of the interior angles.

GeoGebra is a free and multi-platform dynamic mathematics software for schools that joins geometry, algebra and calculus. It received several international awards including the European and German educational software awards.

The goal of the software is to help you the teacher author, edit and compile drill and practice e-learning assignments in math. Topics such as algebra, calculus, trigonometry and geometry can be introduced to students using this educational software. The software is geared towards K-12 particularly from grades 7 - 12. It can also be used to introduce math based topics at college and university levels. The content is created by you the teacher so you decide the difficulty level of each assignment. The purpose of the software is to help your students with calculation methodology by attempting interactive drill and practice assignments.

These tutorials have ben developed by the Western Cape DoE and covers Number patterns and sequences, Functions and graphs, Algebra and equations, Finance, Analytical Geometry, Transformation, Trigonometry and Mensuration, Data handling

CK-12's Middle School Math Grade 6 covers the fundamentals of fractions, decimals, and geometry. Also explored are units of measurement, graphing concepts, and strategies for utilizing the book's content in practical situations. Volume 1 includes the first 6 chapters.

"GeoGebra (www.geogebra.org) is free dynamic mathematics software for all levels of education that brings together geometry, algebra, spreadsheets, graphing, statistics and calculus in one easy-to-use package. Interactive learning, teaching and evaluation resources created with GeoGebra can be shared and used by everyone at www.geogebratube.org. GeoGebra is the world's favorite dynamic mathematics software, has received numerous educational software awards, and supports STEM education and innovations in teaching and learning worldwide. Join us. Dynamic Mathematics for Everyone. * Free to use software for learning, teaching and evaluation * Fully interactive, easy-to-use interface with many powerful features * Access to an ever-expanding pool of resources at www.geogebratube.org * Available in many languages * A fun way to really see and experience mathematics and science * Adaptable to any curriculum or project * Used by millions of people around the world"

Chuck Hoberman's inventions are more than just technological marvels; they're works of art. See how basic principles of geometry help him create extraordinarily strong, expandable structures. Running time 2:29 minutes.

Schlumberger Excellence in Educational Development, Inc. (SEED) offers creative math puzzles, with solutions. Puzzle categories include: * Number Sense * Arithmetic * Probability * Algebraic Thinking * Geometry, Spatial Reasoning, and Visualization * Topology * Logic * Combinatorics * Miscellaneous

"Whether you are confused by multiplication, need extra practice with geometry proofs, or find yourself struggling to understand logarithms, you are sure to find a website from the following list that fits your math needs. Guide to Online Schools has scoured the Internet in order to compile a comprehensive collection of resources for all math subjects, from the basics to calculus."

"The free online Diploma in Mathematics course from ALISON gives you a comprehensive knowledge and understanding of key subjects in mathematics. This course covers calculus, geometry, algebra, trigonometry, functions, vectors, data distributions, probability and chance, and statistics. Qualifications in mathematics are in great demand from employers and this Diploma course will greatly enhance your career prospects."

Explore all of the best K-6 math tools the web has to offer! From basic addition to geometry and fractions, from virtual manipulates to interactive games, from online calculators and converters to graphing tools. You will discover resources for every math topic you teach.