1, area formula of triangle: The area of triangle can be calculated by many methods, and the most commonly used formula is as follows: area =0.5 base height, where the base length is the length of the triangle base and the height is the vertical distance from the base to the opposite side.
2. perimeter formula of triangle: perimeter is the sum of the lengths of three sides, which can be expressed by the following formula: perimeter = side length 1+ side length 2+ side length 3, where side length 1, side length 2 and side length 3 are the lengths of three sides of triangle respectively.
3. Angle and formula of triangle: the sum of three angles of triangle is always 180 degrees, which can be expressed by the following formula: triangle angle and = angle A+ angle B+ angle C = 180 degrees, where angle A, angle B and angle C are the degrees of three angles of triangle respectively.
Knowledge expansion:
Mathematics is a subject that studies quantity, structure, change and spatial model. It is widely used in various fields, including science, engineering, economy, medicine, sociology and so on. The development of mathematics has experienced thousands of years of history, starting from the initial counting and arithmetic, and gradually developing into a discipline covering various branches and fields.
The research scope of mathematics is very extensive, including algebra, geometry, probability theory, mathematical logic, calculus and so on. Algebra is an important branch of mathematics, which mainly studies the operations and laws between numbers and letters. Geometry is the study of space and shape, and probability theory is the study of random events.
Mathematical logic is a subject of reasoning and proof, and calculus is a subject of change rate. Although these branches and fields are different, they are all based on the same mathematics, and they are interrelated and influence each other.
Mathematics plays a very important role in the development of human society. In science, the application of mathematics is more and more extensive, such as physics, chemistry, biology and so on. In engineering, mathematics is also widely used, such as computer science, electronic engineering, mechanical engineering and so on.
In economics, the application of mathematics is also very important, such as statistical analysis, decision analysis, optimization analysis and so on.
The study of mathematics can not only improve our thinking ability and problem-solving ability, but also help us to better understand and master other disciplines. By studying mathematics, we can better understand natural laws and social phenomena, and better grasp the development trend and application of science and technology.
In short, mathematics is a very important subject, which not only has a wide range of applications, but also has an important impact on our study and life. We should attach importance to the study and application of mathematics, constantly improve our mathematical literacy and ability, and lay a solid foundation for future development.