An angle is the space or opening formed when two straight lines or rays meet at a common endpoint. The point where they meet is called the vertex, and the two lines are called the arms or sides of the angle. Angles are typically measured in degrees (°) or radians (rad) using a tool called a protractor. The Main Types of Angles
Angles are primarily classified based on their measurements: Acute Angle: Measures less than 90°.
Right Angle: Measures exactly 90° and forms a perfect “L” shape.
Obtuse Angle: Measures greater than 90° but less than 180°.
Straight Angle: Measures exactly 180° and appears as a straight line.
Reflex Angle: Measures greater than 180° but less than 360°.
Full Rotation / Complete Angle: Measures exactly 360°, representing a complete turn around a point. Crucial Angle Relationships
When multiple lines interact, they create specific geometric rules:
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