Definition of primary school corner
An angle is a part of a plane defined by two rays * * *, usually represented by letters. Primary school angle refers to the angle with a degree less than 90 degrees, namely acute angle and right angle.
The nature of primary school corner
Acute angle: An angle less than 90 degrees is called acute angle, and its degree is between 0 and 90 degrees. Right angle: An angle equal to 90 degrees is called a right angle and consists of a horizontal ray and a vertical ray.
Comparison of angles: Pupils need to learn how to compare angles. The size of two angles can be judged by comparing their degrees. The angle with large degree is large, and the angle with small degree is small. Classification of angles: According to the degrees of angles, angles can be divided into acute angles, right angles and obtuse angles.
Measurement and drawing of primary school angle
Angle measurement: In primary school, students usually use angle measuring tools (such as protractor or rotary protractor) to measure the degree of angle. Angle drawing: Primary school students need to master how to draw a given angle when learning geometric drawing. By using a ruler and a protractor, the angle of a specified degree can be made accurately.
Application of Primary School Corner
Direction judgment: Primary school angle plays an important role in direction judgment. For example, students can use the concept of angle to judge the direction of rotation or to indicate the direction of an object. Geometric shape: In geometry learning in primary schools, angle is the basic element of various geometric shapes. Students can identify and classify different geometric shapes by learning and understanding angles.
Problem-solving: The study of primary school corner is helpful to cultivate students' logical thinking ability and problem-solving ability. By analyzing and calculating angles, students can solve various problems related to angles, such as finding missing angles and solving inequalities.
Expand knowledge:
Obtuse angle: An angle greater than 90 degrees and less than 180 degrees is called obtuse angle. Fillet: The angle equal to 360 degrees is called fillet, which is the angle of the whole circle. Flat angle: The angle equal to 180 degrees is called a flat angle, which is sandwiched by two parallel rays.
To sum up, the primary school corner is an important concept that students come into contact with when studying mathematics in primary schools. Students need to understand the definition, properties and measurement methods of angles and apply them to geometric shape classification and problem solving. In addition, we can further expand our knowledge and understand other types of angles, such as obtuse angle, rounded angle and straight angle.