The book was likely finished sometime in late 1987 or early 1988]. II.The collapse of Communism in the Balkans. It is likely that Gorbachevâs ideas for liberalizing East European communist states worked out best in the Balkan states of Bulgaria and Romania.
A polygon is a  closed plane figure made of three or more straight line segments. The term originated from ancient Greek polygonon, which breaks down to polus (many) and gonia (angle). A polygon is a closed plane figure made of three or more straight line segments.
A shape with many sides is called a polygon. And because math was developed a lot during the greek's time, naming things such as shapes come from the greeks. Triangles (3 sided shapes) only have three angles while Rectangles only have 4 (squares are rectangles). For others, the prefix is penta (5) hexa(6), hepta (7) Octa (8), Nona (9) Deca (10) and so on... So a polygon with 8 sides is called an octagon.