What is the term for an angle that measures less than 90°?

What is the term for an angle that measures less than 90°?

• A. Obtuse angle
• B. Acute angle
• C. Right angle
• D. Straight angle

Answer: (B)

An angle that measures less than 90° is termed an acute angle. Acute angles are characterized by their sharpness and are commonly found in various geometric figures and contexts. This distinction is important in geometry as it helps categorize angles based on their measurements, with acute angles representing one of the foundational types. In comparison, an obtuse angle measures more than 90° but less than 180°, while a right angle is exactly 90°. A straight angle, on the other hand, measures exactly 180° and creates a straight line. Understanding these different types of angles is essential for solving geometric problems and recognizing the properties of various shapes.

An angle that measures less than 90° is termed an acute angle. Acute angles are characterized by their sharpness and are commonly found in various geometric figures and contexts. This distinction is important in geometry as it helps categorize angles based on their measurements, with acute angles representing one of the foundational types.

In comparison, an obtuse angle measures more than 90° but less than 180°, while a right angle is exactly 90°. A straight angle, on the other hand, measures exactly 180° and creates a straight line. Understanding these different types of angles is essential for solving geometric problems and recognizing the properties of various shapes.