Pronunciation: Triangle is a simple and basic geometric shape, which is a plane figure composed of three sides and three internal angles. In mathematics, engineering, physics and other disciplines, triangles have important applications and significance.
First of all, triangle is one of the most basic figures in geometry, and many geometric theorems and formulas are derived from triangle. For example, the base angle theorem, cosine theorem and sine theorem are all important theorems in triangles.
Secondly, triangles are widely used in engineering. For example, the triangle positioning method and triangle proportional measurement method for measuring the earth are all realized through the geometric characteristics of triangles.
Besides, triangles are also very important in the field of physics. For example, the triangle reflection law of light is explained by the angle relationship of triangle, and the triangle two-force balance law is also one of the basic principles in physics.
It is worth mentioning that triangles are still used in many daily lives. For example, how to cut a triangle-shaped bread in cooking and how to design the roof of a building into a triangle are all related to triangles.
To sum up, triangle is a basic and important geometric shape, which has a wide range of applications and significance in mathematics, engineering, physics, daily life and so on. The basic knowledge of triangles is needed in solving problems in computational geometry and explaining laws in physics.