1. Prepare some boxes with desired shapes and put unformed plastic into the boxes;

2. The pattern can be made of plastic tape with a width of 2 cm and a length of 1 m, and marked with scales;

3. Put the unformed plastic into a box about 4 cm long and about 1 mm wide;

4. Make another stick 2 cm wide;

5. After that, put the board in the study box.

The famous sayings of mathematics are as follows:

1, mathematics is a spirit, a rational spirit. It is this spirit that inspires, promotes, inspires and drives human thinking to the most perfect degree, and it is also this spirit.

Trying to decisively influence the material, moral and social life of human beings; Trying to answer questions about human existence; Strive to understand and control nature; Try your best to explore and establish the deepest and most perfect connotation of the knowledge you have learned. -Klein mathematics in western culture

2. Mathematics is a rational spirit, which enables human thinking to be applied to the most perfect degree. Klein

3. Mathematics is a tool of knowledge and a source of other knowledge tools. All the sciences that study order and measurement are related to mathematics. Descartes

Any branch of mathematics, however abstract, will be applied to the real world one day. Lobachevsky

One reason why mathematics is more respected than all other sciences is that his proposition is absolutely reliable and indisputable, while other sciences are often in danger of being overthrown by newly discovered facts. -Einstein

6, mathematics has a high reputation, another reason is that mathematics makes natural science theorem, giving natural science a certain degree of' reliability'. -Einstein

7. What gives me the greatest happiness is not knowing knowledge, but learning constantly; Not what you already have, but what you keep getting; Not the height that has been reached, but the constant climbing. Gauss

8. Some beautiful theorems in mathematics have such characteristics: they are easy to be summarized from facts, but the proof is extremely hidden. Gauss