Answer:
1.Acute Angle
2.Obtuse
3.Line
1.Acute angles measure less than 90 degrees. Right angles measure 90 degrees. Obtuse angles measure more than 90 degrees
2.Acute angles measure less than 90 degrees. Right angles measure 90 degrees. Obtuse angles measure more than 90 degrees
3.Infinitely many points that extend forever in both directions.