Representation method
The degree of a flat angle is 180 degrees, and the symbol is 180 degrees. In mathematics and geometry, degrees are usually used to express angles. Degree means that a complete circle is divided into 360 equal parts, and each equal part is called degree. Therefore, the degree of a flat angle is 180 degrees.
Besides degrees, angles can also be expressed in radians. The radian refers to the unit in which the length and radius of an arc corresponding to an angle are equal, and is usually represented by the symbol rad. For a flat angle, the radian number is π (i.e. 3. 14 15926).
operation sequence/order
Next, we will introduce how to represent a right angle in mathematics and geometry.
Step 1: Draw two rays.
First, you need to draw two rays on a plane. These two rays should intersect at a point, which is called the vertex of the angle.
Step 2: Measure the angle.
Next, you need to measure the angle with a tool such as a goniometer or a square ruler. Place one endpoint of a goniometer or square at the vertex of an angle and rotate the other endpoint along one ray until it intersects the extension line of another ray. At this point, the angle displayed by the goniometer or square is the degree of the angle.
Step 3: Indicate the angle
After measuring the angle, it can be expressed in degrees or radians. For a right angle, its degree is 180 degrees, and its radian number is π.
summary
A right angle is an angle of 180 degrees formed by the intersection of two rays. In mathematics and geometry, the angle is the basic unit of angle and is often used to measure the angle on a plane. The degree of a flat angle is 180 degrees, and the symbol is 180 degrees. Besides degrees, angles can also be expressed in radians. For a right angle, its radian number is π. When representing a right angle, you need to draw two rays first, then measure the angle with an goniometer or a square ruler, and finally express the angle in degrees or radians.