The line segment has two symmetry axes; One is its median vertical line, and the other is its own straight line. A line segment refers to a limited part between two points on a straight line; Connect two points with a ruler and you get a line segment.
Line segments are represented by letters A and B or lowercase letters representing their two endpoints. Sometimes these letters also represent the length of the line segment, which is recorded as line segment AB or line segment BA, line segment A .. where A and B represent the two endpoints of the line segment.
Symmetry axis refers to an imaginary straight line in an object or figure. Fold in half along a straight line, and the two folded parts are completely coincident, then such a figure is called an axisymmetric figure, and this straight line is called the symmetry axis of this figure.
Every time a certain angle is rotated around the symmetry axis, the same part of the object or figure will be repeated once, that is, the whole object or figure will be restored once. The centroid of an object in N-dimensional space is the intersection of all hyperplanes, which divide the object into two parts with equal moments. Then divide a symmetrical figure along the axis of symmetry, and the figure can be divided into two parts with equal moments, that is, the axis of symmetry must pass through the centroid, that is, the centroid is on the axis of symmetry.
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.