A pyramid is a kind of building, which is usually used for tombs or sacrifices. Because it looks like China's Chinese character "Jin", it is called the pyramid. In fact, it has nothing to do with the "golden pyramid", which generally refers to the Egyptian pyramid. Other famous ones are Maya Pyramid, Aztec Pyramid (pyramid of the sun, Moon Pyramid) and so on. The Egyptian pyramids are the imperial tombs in the pyramid shape of the slave society in ancient Egypt. One of the eight architectural wonders in the world. They are numerous and widely distributed. Memphis, the ancient city on the west bank of the Nile in the southwest of Cairo, is the most densely populated area.

96 pyramids have been discovered in Egypt, the largest of which is located in Giza, a suburb of Cairo. The Great Pyramid is the tomb of Khufu, the second king of the fourth dynasty, which was built around 2690 BC. The original height is146.5m, and the top is peeled off due to years of weathering10m, but the current height is136.5m; Each side of the base is more than 230 meters long, the angle of the triangle is 52 degrees, and the bottom area of the tower is 52,900 square meters. The tower consists of 2.3 million stones, each weighing an average of 2.5 tons. It is said that it took 65438+ ten thousand people 30 years to build it. The passage inside the pyramid is open to the outside world, and its exquisite design and accurate calculation amaze the world.