1.   Estimate the measure of .
   
    A. 90° B. 60°
    C. 45° D. 30°
    Hint

  2.   Estimate the measure of the angle shown.
   
    A. B. 75°
    C. 20° D. 50°
    Hint

  3.   What is a reasonable estimate for the measure of the angle shown?
   
    A. 130° B. 85°
    C. 65° D. 100°
    Hint

  4.   Which of the following angles represents a 45° angle?
    A. B.
    C. D.
    Hint

  5.   Identify the angle that measures 60°.
    A. B.
    C. D.
    Hint