Write down the degree of the angle below.

Write the degrees of the following angles:120,70. The topic comes from the fourth grade math corner test, and the calculation method is as follows:

1. Understand the basic concept of angle: First of all, you need to understand the basic concept of angle, including the definition of angle, unit of measurement, special angle and so on. These basic knowledge are the basis of understanding the concept and calculation method of angle.

2. Use a protractor: You need to use a protractor when calculating the degree of angle. A protractor is a tool for measuring angles. It has scale lines with different degrees and can be used to measure different angles.

3. Align the zero scale line: When using the protractor, you need to overlap the zero scale line of the protractor with one side of the angle, and then read the corresponding scale value on the other side, which is the degree of the angle.

4. Calculation of special angles: For some special angles, such as 30, 45 and 60, the degrees can be directly memorized or calculated by trigonometric function.

5. Angle measurement: When calculating the degree of angle, we should pay attention to the following points: First, we should distinguish different types of angles such as acute angle, right angle and obtuse angle; Secondly, we should understand the degree range of different types of angles; Finally, when calculating the degree sum of multiple angles, you need to be careful not to omit or add angles repeatedly.

Practical application of angle;

1, angle measurement: In geometry, angle is an important measurement to describe the included angle between two rays, line segments or planes. The degree of an angle can be used to determine the size, shape and position of an object. For example, on a map, the degree of an angle can be used to determine the geographical position and direction.

2. Mechanical design: In mechanical design, the degree of angle is very important. For example, when designing and manufacturing mechanical parts such as gears, nuts and bolts, it is necessary to accurately calculate angles and positions. Angle can also be used to determine the trajectory and speed of an object.

3. Architectural design: In architectural design, the degree of angle is also very important. For example, in the design and construction of infrastructure such as bridges, buildings and roads, it is necessary to calculate the angle and position accurately to ensure the stability and safety of the structure.

4. Physical experiment: In physical experiment, the degree of angle is very important. For example, in the fields of mechanics, optics and electricity, it is necessary to accurately measure angles and positions to verify physical laws and formulas.

5. Photography and camera shooting: In photography and camera shooting, the degree of angle is also very important. Different angles can produce different visual effects and emotional reactions. For example, when shooting movies, photos and videos, you need to choose the right angle to express the theme and emotion.