Octagons, the first truncation of the square, are not used much in architecture anymore. Orthodox churches are historically known for their octagonal shape. Rectangles play the most important role in architecture. Rectangles are the shape that is seen most. They are used everywhere from buildings, streets, doors, and many more.
Rectangular projects are often times the most comfortable, useful, and easily built.
Because the rectangle is based on the right angle, its geometry is elementary. Size is determined by need, material limitations, site limitations, and budget. Though the size and proportions have a great amount of variety they also change the image and the satisfaction with the rectangular object. A rectangular floor of building with the smallest amount of perimeter surface is the most economical to construct, maintain, heat, and cool. The pentagon is closely related to the circle, and it is the first polygon , in the progression of poygons, that is.