noun
: the part of Euclidean geometry dealing with the simpler properties of straight lines, circles, planes, polyhedrons, the sphere, the cylinder, and the right circular cone
noun
: the part of Euclidean geometry dealing with the simpler properties of straight lines, circles, planes, polyhedrons, the sphere, the cylinder, and the right circular cone
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012