Which angle type measures between 90 and 180 degrees?

Which angle type measures between 90 and 180 degrees?

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

Answer: (A)

Angles are classified by their degree measure. An obtuse angle is greater than 90 degrees but less than 180 degrees, placing it between a right angle and a straight angle. So any angle like 100, 120, or 150 degrees fits this category. The other types don’t fit: an acute angle is under 90 degrees, a right angle is exactly 90, and a straight angle is exactly 180. Therefore, the angle that measures between 90 and 180 degrees is obtuse.

Angles are classified by their degree measure. An obtuse angle is greater than 90 degrees but less than 180 degrees, placing it between a right angle and a straight angle. So any angle like 100, 120, or 150 degrees fits this category. The other types don’t fit: an acute angle is under 90 degrees, a right angle is exactly 90, and a straight angle is exactly 180. Therefore, the angle that measures between 90 and 180 degrees is obtuse.