Written records of the history of China date from as early as 1500 BC, from the Shang dynasty (c. 1600â1046 BC). Ancient historical texts such as the Records of the Grand Historian (c. 100 BC) and the Bamboo Annals (296 BC) describe a Xia dynasty (c. 2070â1600 BC) before the Shang, but no writing on a durable medium have survived.
A square is a quadrilateral so it has 360 degrees. A square is a quadrilateral so it has 360 degrees.
Area of a Square. Square is a polygon with four equal sides in length and has four equal angles. Each angle is 90 degrees (or right angle). In order to calculate the area of a square, multiply the length of two sides (each side is equal in length). The calculator below can be used to calculate the area of a square.