acute angles
Acute angles- An acute angle is an angle whose measure is between 0 and 90. Acute triangle-An acute triangle has three acute angles. Adjacent angles-Adjacent angles are two coplaner angles that have a common side and a common vertex but no common interior points. Alternate interior angles-Given two lines and a transversal, the alternate interior angle are nonadjacent interior angles that lie on opposite sides of the transversal.