How much of a full turn?

This task is about angles of rotation.
For the following questions write what fraction of a full turn each shape can be rotated until it fits onto itself for the first time.

Question 1Change answer

a) 
rotation-shape-1.gif
Rotation =

Question 1Change answer

b)
rotation-shape-2.gif
Rotation =

Question 1Change answer

c)
rotation-shape-3.gif
Rotation =

Question 1Change answer

d)
rotation-shape-4.gif
Rotation =

Question 1Change answer

e)
rotation-shape-5.gif
Rotation =