Question

1. which of the following best describes an \obtuse angle\? a. an angle whose measure is complementary to all other angles b. an angle whose measure is exactly ninety degrees c. an angle whose measure is less than ninety degrees d. an angle whose measure is greater than ninety degrees

Explanation:

• Option A: Complementary angles are two angles that add up to 90 degrees, and this description is incorrect for an obtuse angle.
• Option B: An angle with exactly 90 degrees is a right angle, not obtuse.
• Option C: An angle less than 90 degrees is an acute angle.
• Option D: By definition, an obtuse angle is an angle whose measure is greater than 90 degrees (and less than 180 degrees).

Answer:

D. an angle whose measure is greater than ninety degrees