Question

Fill in the blanks-
If a fan has 3 blades, then its degree of rotation is _____.

Answer 1

Since the fan has three blades, the central angle is divided into 3 equal parts. This gives $\frac{{360}^{\circ }}{3}={120}^{\circ }.$
Angle of rotation is the smallest angle for which the figure can be rotated to coincide with itself.
So, the degree of rotation of the fan is ${120}^{\circ }.$