Acute angle
an angle with a degree measure less than 90
An acute angle is an angle that measures less than 90 degrees (but greater than 0 degrees). It is sharp and narrow, like a corner of a square. The measure of an acute angle can range from 1 degree to 89 degrees. Acute angles are often found in triangles, where they help form the sharper corners of the shape. They play an important role in geometry and trigonometry, where they are used to measure angles and determine the properties of shapes.
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