The circumference of a circle is related to its radius, diameter and area. The circumference of a circle is proportional to the radius of the circle, and the circumference of the circle is equal to π times twice the radius of the circle; The circumference of a circle is also proportional to its diameter, and the circumference of a circle is equal to pi times its diameter; The circumference of a circle and the area of the circle are quadratic, and the area of the circle is equal to the radius of the circle multiplied by half the circumference.

The circumference refers to the length of a circle. Suppose that a regular N-polygon is inscribed in a circle, the side length is set to an, and the perimeter of the regular N-polygon is n×an. When n is increasing, the perimeter of a regular polygon approaches the perimeter of a circle, that is, n approaches infinity, and C=n×an.

The radius of a circle is any line segment from the center of the circle to the circumference, and the diameter is twice the radius. The area of a circle refers to the size of the plane space occupied by the circle, which is often expressed by S. The circle is a regular plane geometry figure, and there are many calculation methods, such as Kepler method and cavalli method.

The circumference of a circle is a mathematical phenomenon that the N-polygon is inscribed in a circle, the side length is set to an, and the circumference of a regular N-polygon is n×an. When n is increasing, the perimeter of regular polygon approaches the perimeter of circle C, that is, n approaches infinity, and C=n×an.

The benefits of learning mathematics

People who are good at math are relatively smart and savvy, and they can show their advantages in dealing with people. The faster you think, the more ways and ideas you have. Cambridge, majoring in financial mathematics at Carnegie Mellon University in the United States, said that studying mathematics has brought her mental exercise and made me pay more attention to the rigor of thinking in my life.

For example, before solving a problem, I like to divide it into several sections, and each section is divided into several steps, so that I can dig slowly like a branch instead of thinking in confusion in front of a pile of data. Mathematics is the foundation of other disciplines, and it is easier for people who learn mathematics well to get into other disciplines. Learning software, computer, finance and other engineering majors is even more handy.

Can manage money better than others. The application of mathematics in life is everywhere. Nowadays, the society is already an information society, and mathematical knowledge is used in financial management and computers. Warren Buffett is very powerful, but Buffett's power is also based on mathematics. Buffett's decision-making process is actually the method of using subjective probability.