The ancient Greek mathematician Euclid proved in his Elements of Geometry that there are only five Platonic solids – the regular tetrahedron (four sides that are equilateral triangles), the cube (six ...
geometric properties can be employed to determine various elements of the surface depicted such as angles of intersection and lengths. All such properties of three-dimensional objects are essential ...
The Wisteria Table Lamp (Clara Driscoll - Tiffany Studios, c.1905) has a cylindrical shade topped by a dome, so it is a geometric form. But the bottom of the shade has an irregular edge ...
A Sequel to the First Six Books of the Elements of Euclid; containing an Easy Introduction to Modern Geometry (with numerous Examples). By John Casey (Dublin: Hodges, 1886.) ...