GEOMETRIC

geometrical [adjective]A geometric pattern or arrangement is one which is made up of shapes such as squares, triangles or rectangles.The wallpaper has a geometric design of overlapping circles.A geometric(al) progression is an ordered set of numbers, where each is in turn multiplied by a fixed amount to produce the next."What is the next number in the geometric progression 1, 3, 9, 27, 81?" "243."