What is the classification of an angle whose measure is between 90 and 180 degrees?

What is the classification of an angle whose measure is between 90 and 180 degrees?

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

Answer: (C)

An angle whose measure is between 90 and 180 degrees is classified as an obtuse angle. An obtuse angle is characterized by its larger than right angle measurement, but it does not reach straight angle status, which is exactly 180 degrees. To understand this classification better, consider the definition of other types of angles: an acute angle measures less than 90 degrees, while a right angle measures exactly 90 degrees. A straight angle, on the other hand, is defined as being exactly 180 degrees. Since the angle in question falls within the range exceeding 90 degrees but not reaching 180 degrees, it is correctly identified as an obtuse angle.

An angle whose measure is between 90 and 180 degrees is classified as an obtuse angle. An obtuse angle is characterized by its larger than right angle measurement, but it does not reach straight angle status, which is exactly 180 degrees.

To understand this classification better, consider the definition of other types of angles: an acute angle measures less than 90 degrees, while a right angle measures exactly 90 degrees. A straight angle, on the other hand, is defined as being exactly 180 degrees. Since the angle in question falls within the range exceeding 90 degrees but not reaching 180 degrees, it is correctly identified as an obtuse angle.