Angles can be classified based on their measures into four main types: acute, right, obtuse, and straight angles.
- Acute Angle: An acute angle measures less than 90 degrees. These angles are sharp and narrow, making them common in many geometric shapes.
- Right Angle: A right angle measures exactly 90 degrees. It is often represented by a square corner and is a fundamental building block in geometry, especially in the context of rectangles and squares.
- Obtuse Angle: An obtuse angle measures more than 90 degrees but less than 180 degrees. These angles appear wider than right angles and can often be found in various types of polygons.
- Straight Angle: A straight angle measures exactly 180 degrees. This angle looks like a straight line and is formed when the two rays are in opposite directions.
Understanding these classifications is crucial in geometry, as they help in recognizing and constructing various shapes and figures. Each type serves a distinct purpose and has unique properties that are utilized in different mathematical contexts.