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.
Sure - a triangle could have 40, 70 and 70 degree angles. There's probably an infinite more amount of those. not possible,for a triangle the sum of three angles should be 180 degree. so even one side has 0.1 degree the other can only have 90 degree and 89.9 degree.so it is not possible.