The number of fan-shaped stones in Tiantan floor tiles is a college entrance examination question. The original title is:
If the ball altar in the Temple of Heaven in Beijing is a place of worship in ancient times, it is divided into three layers: upper, middle and lower. There is a circular stone slab (called Tianxin Stone) in the center of the superstructure, and nine fan-shaped stone slabs are built around Tianxin Stone to form the first ring, with nine pieces added to each ring in turn. Compared with the last ring of the previous layer, the first ring of the next layer has 9 more layers, and each ring outward has 9 more layers in turn. It is known that each layer has the same number of rings, and the lower layer has 729 more rings than the middle layer, so all three layers have fan-shaped slates (excluding Tianxin stone)? ( )?
Answer:
In the center of the dome is a round marble slab called Tianxin Stone, also called Taiji Stone. A fan-shaped stone from the center to the periphery. There are nine rings in the upper altar, and the number of fan-shaped stones in each ring is a multiple of nine. The first ring has 9 fan stones, the second ring 18, and the third ring has 27 ... The 8 1 of the ninth ring is named Jiujiu. The middle altar consists of 126 pieces of nine from the former ten ring, that is, 90 fan stones to the 18th ring, and the lower altar consists of 243 fan stones from the 19th ring to the 27th ring. There are 378 "Jius" in the three-story altar, with 3402 fan stones.
Extended data:
The Temple of Heaven was founded in Yongle 18 (A.D. 1420), and it was the place where emperors of Ming and Qing dynasties sacrificed to the gods of heaven and earth.
Tiantan Park, with 92 ancient buildings and more than 600 guest rooms, is a master of architectural art in Ming and Qing Dynasties. It is a treasure of ancient architecture in China and the largest existing ancient architectural complex in the world. The magnificent Hall of Prayer for the New Year, the sacred and majestic dome and the elegant and solemn Zhai Palace are all located among thousands of trees, forming a unique garden landscape and becoming a scenic spot integrating ancient architecture, acoustics, history, astronomy, music and dance in China.
As early as 19 18, Tiantan Park was officially opened to the public. The data shows that the number of visitors to the Temple of Heaven in 20 10 reached 22 million, of which more than 7 million were pure tourists at home and abroad, and the rest140,000 were Beijing citizens, especially fitness people. Tiantan Park has become a part of Beijing people's life. The Temple of Heaven has a huge area, and it is within the Second Ring Road of Beijing, just a stone's throw away from the State Sports General Administration, so it has a profound sports atmosphere and naturally becomes a gathering place for Tai Ji Chuan fans.