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 is a carefully got-up and good work on the subject of which it treats. After the usual preliminary matter on definitions and the use of instruments are given 333 problems. This may appear to be ...

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 ...