The outer and inner angles of à regular polygon are in the ratio 2:7. How many sides does it have?

One angle of a regular polygon is 144^(circ) . How many șides does it have?

The sum of the outer angles of a polygon is twice the sum of the inner angles. How many sides does it have? What if the sum of outer angles is half the sum of inner angles? And if the sums are equal?

The outer angles of triangle are in the ratio 5: 6: 7 . What are the angles?

How many even factors does 3600 have?