



 Dynamic geometry programs are powerful educational tools for teaching and learning of geometry, and sometimes even other areas like algebra and calculus. Basically, it allows students or teachers to construct and measure geometrical figures that can be easily modified with the mouse based on the geometric relations specified by the user, thus supporting demonstration and exploration of geometric concepts. The first 3 items below are popular and well developed commercial programs of this kind. The others are freeware performing similar basic functions.






 This folder contains some examples of 3D figures created with Wingeom





 Cabri 3D is a new interactive solid geometry software, evaluation version is available; construct and manipulate 3D figures





 Here are some sample Cabri 3D files (.cg3) and html files embedding the 3d dynamic figures (can be opened with your browser after installing the evaluation version of Cabri 3D).






 Rotate a cube about an axis through opposite vertices






 Rotate a regular octahedron about an axis through midpoints of opposite edges






 3 other platonic solids inscribed






 Mutually perpendicular edges






 Golden rectangles inscribed






 Net of a regular octahedron






 Triangular prism cut into 2 pyramids of equal volume






 Pyramids of same base and height






 Perspective drawing of a cube






 Perspective drawing of a square 1






 Perspective drawing of a square 2






 Tangent planes of a sphere





 GeoGebra is a freeware incorporating most common tools in geometry, algebra and calculus. It has a Chinese interface and could export files as Java applets.







 Links to resources in Dynamic Geometry






