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.
A square is a rectangle in which all four sides are equal length and create four ninety degree angles. A circle is a round shape that has no sides or corners. A parallelogram has four sides, four vertices, and two parallel sides. A quadrilateral has four sides, four vertices, and two diagonals.