Question

An architect designs two walls of a museum to meet at an angle of 120 degrees. What is an angle of this size called?

A. acute
B. obtuse
C. right
D. straight

Answer 1

An angle measuring 120 degrees is categorized as an obtuse angle since it is larger than a right angle but less than a straight angle. The correct answer to the question is Option B: obtuse.

Step-by-step explanation:

An angle that measures exactly 120 degrees is larger than a 90-degree right angle but less than a 180-degree straight angle. Therefore, such an angle is categorized as an obtuse angle. In geometry, an obtuse angle is defined as one that measures more than 90 degrees but less than 180 degrees. In terms of the choices provided:

• A. An acute angle measures less than 90 degrees.
• B. An obtuse angle measures between 90 and 180 degrees.
• C. A right angle measures exactly 90 degrees.
• D. A straight angle measures exactly 180 degrees.

Hence, the correct answer to the question is Option B: obtuse.