What mathematics is there in life?

There are many. Let's give a few examples. 1, the blade rotates around the center: there are countless straight lines behind a point. 2. Triangle bracket: Triangle has stability. 3. Quadrilateral sliding door: Quadrilateral instability. 4. Functional relationship among speed, time and distance. 5. Use coordinates to indicate geographical location. Whether you can win the lottery is a question of probability. 7. The smooth flight of kites is the application of the nature of axisymmetric graphics.