1. Isostatic angle: Isostatic angle refers to the corresponding angle formed by cutting two parallel lines on a section. When a straight line intersects two parallel lines, congruent angles are on the same side of the two parallel lines and are equal.
2. Internal dislocation angle: Internal dislocation angle refers to the dislocation angle formed by a cutting line cutting two parallel lines. When a straight line intersects with two parallel lines, the internal dislocation angles are within the two parallel lines respectively, and the dislocation angles are equal.
3. Internal angle of the same side: the internal angle of the same side refers to the internal angle cut by two parallel lines. When a straight line intersects with two parallel lines, the internal angles on the same side are on the same side of the two parallel lines respectively, and the internal angles are equal.
Extended data:
The difference between congruent angle, internal angle and internal angle on the same side;
1, isomorphic angle feature: when two straight lines are cut by a third straight line, they are all in the same direction of the two straight lines, and the two angles on the same side of the cut line are isomorphic angles.
2. The characteristics of the internal angle: when two straight lines are cut by the third straight line, they are sandwiched inside the two straight lines, and the two angles on both sides of the cutting line are internal angles.
3. Characteristics of the inner angle on the same side: when two straight lines are cut by the third straight line, they are sandwiched between the two straight lines, and the two angles on the same side of the cutting line are the inner angles on the same side.
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First, the angle introduction:
An angle is a unit of measurement used to indicate the degree of rotation between two rays. Angles are usually expressed in degrees and symbols. The basic angle is set to facilitate the measurement and calculation of the angle. Some special angles often appear in practical problems, such as 30, 45 and 60. Using the basic angle can simplify the calculation process.
Second, the characteristics of the basic angle:
The degree of the basic angle is fixed and is not affected by other factors. The basic angle can be obtained by geometric drawing method, such as ruler and protractor.
Third, use the basic angle to measure:
The basic angle can be used to measure and calculate the size of other angles, and the values of other angles can be obtained by simply adding, subtracting, multiplying and dividing the basic angle. For example, to calculate the cosine value of an angle, you can first convert the angle into a basic angle, and then use a trigonometric function table or calculator to find the cosine value corresponding to the basic angle and make the necessary conversion.
Fourth, the application of the basic angle:
Basic angle is widely used in mathematics, physics, engineering and other fields involving angle calculation. They can help simplify the calculation process and improve the calculation efficiency.
In geometry, basic angles can be used to construct some special shapes or solve some special problems. For example, an equilateral triangle can be formed with angles of 30 and 60, and a right angle can be determined with an angle of 45 in drawing.
In physics, the basic angle can be used to describe the position, direction and motion of an object. For example, in mechanical engineering, the basic angle can be used to determine the rotation angle of objects, so as to design and control mechanical devices.
Verb (abbreviation of verb) summary:
The basic angle refers to the degree of an angle between 0 and 90. Using basic angles can simplify the measurement and calculation of angles. They are fixed and can be obtained by geometric drawing. The basic angle is widely used in various fields involving angle calculation, which is helpful to simplify the calculation process and solve special problems.