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Estimating and comparing angles

Question

Name these angles.

a An angle with the angle marked with a small square in the corner. Half a straight angle.
 
  check answer for question a.
b An angle larger than a right angle, but smaller than a straight angle.
 
  check answer for question b.
c An angle on a straight line.
 
  check answer for question c.
d An angle made by a full revolution.
 
  check answer for question d.
e An angle smaller than a right angle.
 
  check answer for question e.
f An angle smaller than a straight angle, but larger than a right angle.
 
  check answer for question f.