alleryAn angle that is smaller than a right angle is called what?
AReflex angle
BStraight angle
CObtuse angle
DAcute angle
Answer & Solution
Correct answer: D. Acute angle
1. A right angle is 90 degrees.
2. An angle of less than 90 degrees is acute.
3. An obtuse angle is bigger than 90 degrees.
_Source: Wikipedia, Angle (CC BY-SA 4.0), Types of angles_
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