




 Folding a piece of triangular paper






 An example in surveying; finding height of object from angles of elevation, the general case. (This is a Cabri 3D v2 file, with measurement of angles and segments).





 Spatial Reasoning through manipulation of unit cubes and other virtual solids





 NCTM lessons using cubes and isometric drawing.





 Part 1 Exploring isometric drawing tool





 Part 2 Solid to isometric  One to many





 Part 3 Other 2D representations  FrontRightTop





 Part 4 Volume and surface area, finding patterns






 The lessons make use of an interactive tool for isometric drawing and rotating corresponding solids built from cubes.





 'Geometry in 3 dimensions' in MathsNet contains links to selected applets in Wisweb, which are exercises or puzzles requiring users rotate objects and explore different views. (see applets marked with "W")






 'building houses 1' is one of such applets, allowing users to build solids with cubes, rotate and check its various views






