Question 360118
Geometry is the study of shape and size. The geometry of our everyday world is based on the work of Euclid, who lived about 300 BC. Euclidian geometry has a rigorously developed logical structure. Three basic undefined terms are point, line, and plane. A point is a tiny dot: it has zero height, zero width, and zero thickness. A line goes off straight in both directions. A plane is flat surface, like a tabletop, extending off to infinity.