An angle that is greater than 180° is called what?

An angle that is greater than 180° is called what?

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

Answer: (D)

An angle that is greater than 180° is referred to as a reflex angle. This type of angle measures between 180° and 360° and represents the larger rotation needed to reach the position of the terminal side of the angle from the x-axis to the line extending from the vertex. Reflex angles are commonly encountered in various geometric contexts, particularly in analysis and constructions involving circles. In contrast, a straight angle is exactly 180°, while an obtuse angle measures more than 90° but less than 180°. An acute angle, on the other hand, is one that measures less than 90°. Understanding these definitions helps clarify why a reflex angle is specifically identified when referring to angles greater than 180°.

An angle that is greater than 180° is referred to as a reflex angle. This type of angle measures between 180° and 360° and represents the larger rotation needed to reach the position of the terminal side of the angle from the x-axis to the line extending from the vertex. Reflex angles are commonly encountered in various geometric contexts, particularly in analysis and constructions involving circles.

In contrast, a straight angle is exactly 180°, while an obtuse angle measures more than 90° but less than 180°. An acute angle, on the other hand, is one that measures less than 90°. Understanding these definitions helps clarify why a reflex angle is specifically identified when referring to angles greater than 180°.