It is a double syllabus, being a syllabus of geometrical constructions and a syllabus of plane geometry ... Boys thus obtain some idea of the objects of pure geometry and of what is involved ...

This group discusses objects associated with plane geometry. For a collection of materials relating to spherical trigonometry, see the web object group Trigonometry for the Sphere.

They have now combined theory, simulations, and experiments to understand what happens when an imperfect, spherical object is placed on an inclined plane. How gravity causes a perfectly spherical ...