If a regular polygon has 72 sides and an order of 72,what is the polygon’s rotational angle?

The rotational angle of a regular polygon with 72 sides is 5º.

Step-by-step explanation:

The rotational angle (), measured in sexagesimal degrees, of polygon of sides is the angle of a complete revolution divided by the number of sides (). That is:

(1)

If we know that , the rotational angle is:

The rotational angle of a regular polygon with 72 sides is 5º.

reduce the friction between its moving parts

step-by-step explanation:

in fact, by reducing the friction between the moving parts of the machine, it is possible to reduce the energy wasted due to this friction; therefore, more input energy is converted into useful work, and this will improve the efficiency of the machine.