What is the angle of rotation of this regular decagon? what is the measure of an interior angle?

A decagon has 10 sides. If the polygon is symmetrical, the angle of rotation is given by the following equation:

360 / (number of sides)

Therefore, 

360 = 10 = 36.

The interior angles are determined by the following equation:

180 - (angle of rotation)

Therefore, 

180 - 36 = 144

The answer is A.

D

Step-by-step explanation:

It is very large because it is in scientific form. So we must convert it to Kilometers. I hope this helps!!! Please make me brainiest!