Acute Angle between Pair of Lines is the angle between any pair of lines which is less than 90 degrees, in the two dimensional plane. And is denoted by ∠Acute. Acute Angle between Pair of Lines is usually measured using the Degree for Angle. Note that the value of Acute Angle between Pair of Lines is always positive. Typically, the value of Acute Angle between Pair of Lines lies in the range from 0 to 90.