What is the golden ratio?

The golden section refers to dividing the whole into two parts, and the ratio of the larger part to the whole is equal to the ratio of the smaller part to the larger part, and the ratio is about 0.6 18.

This ratio is recognized as the most aesthetic ratio, so it is called the golden section.

In ancient Greece, Pythagoras was walking in the street one day. Before passing the blacksmith's shop, he heard the sound of striking the iron, so he stopped to listen. He found that the blacksmith had a regular rhythm in striking iron, and the proportion of this sound was expressed mathematically by Pythagoras.

When a line segment is divided into two parts so that the ratio of the larger part to the total length is equal to the ratio of the smaller part to the larger part, this ratio is the golden section. The ratio is the difference between the root number five minus one divided by two, and the approximate value is 0.6 18, usually expressed by the Greek letter Ф.