Ruler and Compass
An introduction to geometry without measurements. Since the earliest times, mankind has employed the simple geometric forms of straight line and circle, in art, architecture, and mathematics. Originally marked out by eye and later using a stretched cord, in time these came to be made with the simple tools of ruler and compass. This valuable reference book introduces the origins and principles of geometry using these basic tools, and shows some of the geometric constructions used by artists, architects, and mathematicians of old.