(Jimmy of the Clue Crew shows an animated angle on the monitor.)  With a measure of less than 90 degrees, an angle like the one seen here is referred to as this type of angle
[DOC] [TLE] Acute, right, & obtuse angles | Angles | Geometry foundations | High ... [PAR] Apr 13, 2011 - 6 minAcute angles measure less than 90 degrees.