The measure of an internal angle of an n - sided regular polygon is 1600. The value of n is -
15
16
17
18
(n−2)180on=160o
⇒n=18
Ratio of measure of each internal angle to that of an external angle of an `n' sided regular polygon is 11:2. The value of `n' is -
The difference between the measure of an internal angle to that of an external angle of a regular polygon is 90∘. The value of `n' is