Find the measure of each exterior angle of a regular decagon.

Find the measure of each exterior angle of a regular polygon of $15$ sides.

Is it possible to have a regular polygon each of whose exterior angles is $50°$?

Find the measure of each interior angle of a regular polygon having $10$ sides.

Find the measure of each interior angle of a regular polygon having $15$ sides.

Is it possible to have a regular polygon each of whose interior angles is $100°$?

What is the sum of all interior angles of a regular pentagon?

What is the sum of all interior angles of a regular hexagon?

What is the sum of all interior angles of a regular nonagon?