Angles are an important part of mathematics, and angle theorems help us understand the properties of angles and how they relate to each other. Angle theorems allow us to calculate the size of angles and to determine the relationships between them. They are used in geometry and trigonometry to help us solve various problems. Some of the most common angle theorems include the angle sum theorem, the exterior angle theorem, and the triangle angle bisector theorem. These theorems can help us calculate angles in triangles and quadrilaterals, as well as other shapes. Angle theorems are very useful in mathematics and can help us understand the properties of angles and how they relate to each other.