Basic geometrical ideas

Geometry has a long history dating back to ancient times. The term 'Geometry' comes from the Greek words 'Geo' meaning Earth and 'metron' meaning Measurement. Geometric ideas were developed due to needs in art, architecture, construction and land measurement. Even today, geometric concepts are reflected in art, measurements, architecture and engineering. Basic geometric shapes include points, lines, line segments, rays, curves and polygons. Points determine locations, lines extend indefinitely, line segments connect two end points, rays start at a point and extend in one direction, curves are non-straight shapes, and polygons are closed figures made of line segments.