An angle is formed when two lines or rays meet at a point called the vertex. The amount of turn between the two lines is measured in degrees (°). Angles can be classified into different types based on their measurements: acute angles (less than 90°), right angles (exactly 90°), obtuse angles (greater than 90° but less than 180°), and straight angles (exactly 180°). Angles are essential in various fields, including geometry, trigonometry, and architecture. They help in understanding shapes, designing structures, and solving problems related to distance and direction. Angles are also used in everyday activities, such as measuring the height of objects or determining the slope of a roof.