acute angle
Angle measures between 0 and 90
An acute angle is any angle that measures greater than 0 degrees (the starting point or initial side) and less than 90 degrees (the ending point or terminal side). In other words, it is an angle that is smaller than a right angle. It is called an acute angle because it is sharp or pointed, creating a acute (pronounced a-kyoot) effect. Acute angles are commonly found in everyday life, such as the angles formed in the corner of a piece of paper, the angles of a triangle, or the angles formed when two lines intersect. It is important to note that an acute angle can also be measured in radians, with its measure being less than pi/2 radians.
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