Answer:
0.2π radians .
Step-by-step explanation:
The formula for the length of an arc is L = r Ф where Ф is the angle in radians through which the arc passes and r = the radius of the circle.
36 π = 20Ф
Ф = 1.8π radians
So the small angle theta = 2π - 1.8π = 0.2π.
