How many gold points are there on the five-pointed star? Where is the golden section of a person?

. The pentagram is very beautiful. There are five stars on our national flag, and many countries also use five-pointed stars on their national flags. Why? Because the length relationship of all the line segments that can be found in the five-pointed star conforms to the golden section ratio. All triangles that appear after the diagonal of a regular pentagon is full are golden section triangles. Since the vertex angle of the five-pointed star is 36 degrees, it can also be concluded that the golden section value is 2Sin 18 degrees.

The golden section is about 0.6 18: 1, which means that a line segment is divided into two parts, so that the ratio of the length of the original line segment to the length of the longer part is the golden section. There are two such points on the line segment. Using two golden points on the line segment, a regular pentagram and a regular pentagon can be made.

The scale diagram in the human body appears at the golden section of the human body. Cai Xin, a German aesthetician, did a lot of calculations on the human body and found that there are four golden sections. That is the navel, throat, knees and elbows. As far as the human body structure is concerned, if the ratio of above navel to below navel is 0.6 18: 1, it constitutes the golden section. As we all know, such a ratio will give people a sense of comfort and beauty. In addition, the human body has three golden sections. One is the part above the navel, and its golden section is in the throat. The ratio of throat to top of head and throat to navel is 0.6 18: 1. The other is the part below the navel. Her golden section is at the knee, and the ratio of navel to knee and knee to heel is 0.6 18: 1. Another place is the upper limbs. The golden point of upper limb is elbow joint, and the ratio of shoulder joint to elbow joint and elbow joint to middle finger tip is 0.6 18: 1. If the four structural proportions of the human body conform to the golden section law, it is naturally the best looking. For example, the statue of Venus, which people are familiar with, is short, moderate and interesting, and is sung for the world. She is so beautiful because she conforms to her body shape and structure. In ancient Greece, there was a sculpture art of "showing permanent charm", which reflected the outstanding achievements of people in applying mathematical concepts and sculpture art at that time. Here is the embodiment of the laws of proportion, balance and harmony in formal beauty. These brilliant arts have become a model that embodies the principle of beauty and the harmonious unity of mathematical concepts. When examining the beauty of women's body, there are also "three measures", namely, chest circumference, waist circumference and hip circumference. According to the latest international beauty standards, the ideal three dimensions of female physical beauty should be bust = height × 0.51(), waist = height × 0.34 (cm) and hip = height × 0.542 (cm). If the female's height is 1.65m, her bust should be 84.2 cm, her waist should be 56. 1 cm and her hip should be 89.4cm..