An obtuse angle is an angle greater than 90 degrees but less than 180 degrees, and its degrees range from 90 degrees to 180 degrees. In geometry, an obtuse angle is usually described as an inward bending angle with two opposite sides, but it is not enough to form a right angle (90 degrees) or an acute angle (less than 90 degrees). It is a large angle, but it is still less than 180 degrees, so it is called obtuse angle.
An obtuse angle is an angle greater than 90 degrees but less than 180 degrees. When measuring an angle, we express it in degrees. So the obtuse angle ranges from 90 degrees to 180 degrees. Specifically, the obtuse angle can be defined as the rotation angle between two rays, in which one ray rotates from the starting position to the other ray, so that the rotation angle is greater than 90 degrees but less than 180 degrees.
An obtuse angle is usually described as the angle at which two opposite sides bend inward, but it is not enough to form a right angle (90 degrees) or an acute angle (less than 90 degrees). This makes obtuse angle have a unique position in geometry, because it does not conform to the traditional definitions of acute angle and right angle.
Geography and navigation: The concept of obtuse angle is very important in geography and navigation. When measuring directions or angles, an obtuse angle can be used to describe the rotation between the two directions. Geometry and trigonometry:? In geometry and trigonometry, obtuse angle is an important concept to solve the problems of triangles and polygons.
Properties of obtuse angle
1, angle degree range:? The degree of obtuse angle ranges from 90 degrees to 180 degrees and is greater than 90 degrees.
2. Face to face: The two sides of an obtuse angle are usually opposite, which is why it is called "bending inward".
3. Not an acute angle or a right angle: The obtuse angle is not an acute angle (less than 90 degrees) or a right angle (90 degrees), which is different from the other two common angles.
4. obtuse angle pair:? If the sum of the degrees of two angles is equal to 180 degrees, one of them is an acute angle and the other is an obtuse angle, they are called "obtuse angle pairs".
5. Angle measurement:? The degree of obtuse angle can be measured and calculated by protractor or mathematical formula.