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 little book will be found very useful for the teaching of the fundamental principles of geometry to young students. The most important properties of triangles and other plane figures are ...

THIS work would have been more correctly described as being “by Eugène Roucheé and Ch. de Comberousse, translated and edited by Richard P. Wright,” &c. But, although Mr Wright can lay small claim to ...