Find an angle between 0 and 2π that is coterminal with 27 pi/10

What numbers are included in the set of integers? what numbers are not included?

On traditional maps, earth is represented in a flat plane, or by euclidean geometry. however, a globe is a more accurate model that comes from elliptical geometry.how does a globe represent the fact that there are no parallel lines in elliptical geometry? the equator is not parallel to any other latitudinal lines. the north and south poles are never connected by a geodesic. the geodesics connecting the north and south poles never intersect. the geodesics connecting the north and south poles intersect at both of the poles.

If you have 12 feet of string and you cut it into equal length of 5 inches each how much string will be left