To judge what an angle is, you can compare it with a right angle, an acute angle or an obtuse angle on a triangle.

1. If an angle corresponds to a right angle on a triangle, then the angle is a right angle. This angle is 90 degrees. Acute angle: If an angle corresponds to an acute angle on a triangle, it is an acute angle. The angle is less than 90 degrees. Oblique angle: If an angle corresponds to an obtuse angle on a triangle, then the angle is an obtuse angle. The angle is greater than 90 degrees.

2. Besides using triangles, there are other ways to judge what an angle is, such as measuring the degree of the angle with a protractor, or judging by observing the shape and size of the angle. The use of triangle is a relatively simple and intuitive method, which is suitable for preliminary judgment or emergency use.

Function of triangular plate

1, angle measurement: triangles can be used to measure angles, especially right angles, acute angles and obtuse angles. By comparing the triangle with the target angle, the size of the target angle can be determined. This measurement method is simple and intuitive, and is suitable for various occasions.

2. Drawing geometric figures: triangles can be used to draw various geometric figures, such as straight lines, parallel lines and triangles. The use of triangle can ensure the accurate drawing angle and straight lines, which is very suitable for making drawings, drawing maps and other occasions that need accurate drawing.

3. Calibration tools: Triangle can also be used to calibrate other measuring tools, such as protractor and rangefinder. By comparing triangles with these tools, the accuracy and reliability of these tools can be ensured. Auxiliary calculation: triangles can help some simple calculations, such as addition, subtraction, multiplication and division of angles. By using triangles, the calculation process can be more intuitive and simple.

4. Teaching tools: In the teaching of mathematics, physics and other disciplines, triangles are widely used as teaching AIDS and models to help students better understand concepts such as angles and parallel lines. By using triangles to demonstrate and experiment, students can understand these knowledge points more deeply.