Question

complete this sentence with the best of the choices given.
a(n) ______ is an angle with a measure of less than 90.
after you pick your answer press go.
a. obtuse angle b. right angle
c. complementary angle d. acute angle
e. adjacent angle

Explanation:

• Option A: An obtuse angle measures more than 90° and less than 180°, so it's incorrect.
• Option B: A right angle measures exactly 90°, so it's incorrect.
• Option C: Complementary angles are two angles whose sum is 90°, not a type of angle defined by its own measure, so it's incorrect.
• Option D: An acute angle is defined as an angle with a measure less than 90°, which matches the description in the sentence.
• Option E: Adjacent angles are angles that share a common side and vertex, not defined by their measure, so it's incorrect.

Answer:

D. acute angle