The golden section refers to dividing a line segment into two parts so that the ratio of one part to the total length is equal to the ratio of the other part to this part. The ratio is an irrational number, expressed as a fraction (√5-1)/2, and the approximate value of the first three digits is 0.618. Because the shape designed according to this ratio is very beautiful, it is called the golden ratio, also known as the ratio of China to foreign countries. This division point is called the golden section ratio, and is usually represented by Φ. This is a very interesting number. It is approximated by 0.618. Through a simple calculation, you can find: (1-0.618)/0.618≈0.618, that is, there are two golden ratio points on a line segment.
