The sum of the measures of the exterior angles of a polygon is $°$.

Each exterior angle of a regular polygon of $12$ sides is _____$°$.

If the measure of each exterior angle of a regular polygon is $36°$ then it has _____ sides.

If the sum of all interior angles of a pentagon is $k°$, then find the value of $k$.

Find the sum of all interior angles of the following regular polygons.

Hexagon

Find the sum of all interior angles of the regular Nonagon.

Find the sum of all interior angles of the regular polygon of $11$ sides.

Find the sum of all interior angles of the regular polygon of $16$sides.

What is the number of sides of a regular polygon having the sum of angles as $1980°$?