Question

1. choose the best answer. which angle has a measure less than 90 degrees?

a
b
c
d

Explanation:

• An acute angle is less than 90 degrees, a right angle is 90 degrees, an obtuse angle is more than 90 but less than 180, and a straight angle is 180 degrees.
• Option A shows an acute angle (less than 90°), Option B is obtuse (more than 90°), Option C is right (90°), Option D is straight (180°). So the angle with measure less than 90° is A.

Answer:

A. The angle in option A (acute angle, less than 90 degrees)