THIS text-book of modern projective geometry forms an admirable introduction to the subject, and should be known to all who are interested in this branch of mathematics. The first chapter deals with ...

Arc length is a fraction of circumference. Area of a sector is a fractions of the area of a circle. Both can be calculated using the angle at the centre and the diameter or radius. Practice circle ...

Titch could not be more excited about a trip to the seaside with her uncle Ted. However, Ted is a bit worried, as he has promised to help Titch to learn about geometry and he is not really sure what ...