The golden section principle was discovered by the Greeks in 500 BC. This principle was once called the "key" of applying proportion. The golden section principle is to divide a whole into two parts, and the ratio of the smaller part to the larger part is equal to the ratio of the larger part to the whole, which is expressed by the formula: a:b = b: (a+b). And the ratio of a rectangle that conforms to the golden section principle is 1: 1.438+08. Proper proportion has a harmonious aesthetic feeling and becomes an important content of the law of formal beauty. The proportion of beauty is an important factor in the size of all visual units and the arrangement and combination between units in the plane composition.

This link is Leonardo da Vinci's or a typical golden section: /i? ct=5033 16480。 z = 0 & amptn = baiduimagedetail & ampC6 % BD % F0 % B7 % D6 % B8 % EE & amp； in = 26399 & ampcl = 2 & ampcm= 1。 sc = 0 & amplm=- 1。 pn=8。 rn= 1。 di= 1 106366580。 ln=58。 fr=

This is the most accurate figure of the "Vitruvian Man" of the human body at that time. It was shaped as a cross and the composition of the human body with open hands, and together with the outer circle frame, it constituted a sign of an inner cross and an outer circle. At that time, the cross was regarded as the representative of the church and men, and the circle was the holy grail and the woman, symbolizing the harmony between Yin and Yang. The natural center of the human body is the navel. Because if a person opens his hands and feet, makes a supine posture, and then draws a circle with a compass centered on the navel, then his fingers and toes will touch the circumference. In this way, you can not only draw circles in the human body, but also draw squares in the human body. That is, if you measure from the soles of your feet to the top of your head and move this amount to your open hands, you will find that the height and width are equal, just like determining a square on a plane with a ruler. How's it going? Isn't it wonderful? What was interesting at that time was not only that, but the proportion of human body and the golden section were the key points. The golden section is "0.6 18", which was applied to plastic arts by ancient Greek aestheticians because it has aesthetic value, because any body that conforms to the golden section law is always the most beautiful. For example, the height divided by the distance from the navel to the ground, the distance from the shoulder to the fingertip divided by the distance from the elbow joint to the fingertip, and the distance from the hip to the ground divided by the distance from the knee to the ground are all golden sections.