To illustrate the Pythagorean Theorem, makers of geometric models have long made models with pieces that could be arranged either as a square with a side equal to the length of the hypotenuse of a ...

THIS book appears to compare very favourably with most English works of its class. The greater part of it deals with practical solid geometry, including the method of indexed plans; this subject is ...

THE authors of these two volumes (obtainable also as a single book) regard the teaching of geometry as divisible into four stages. The first consists of little more than instruction in the use of ...