Acute Angle
An angle that measures less than 90 degrees
An acute angle is an angle that measures less than 90 degrees, which means it is smaller than a right angle (90 degrees). In other words, if two lines or rays meet at a point to form an angle and the measure of that angle is less than 90 degrees, then it is an acute angle. Examples of acute angles include angles formed by a triangle’s sides, the angle between the minute and hour hands of a clock at any time before 3:00, and angles formed by the hands of a person making a triangle with their body. Acute angles are important in geometry, trigonometry and various other fields of mathematics.
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