Question

can a regular polygon have each of its exterior angle measuring 19°​

Answer 1

(a) 

Exterior angle =22∘

360∘ is not perfect multiple of 22∘. 

It is not possible to have such polygon.

(b) 

Interior angle =22∘

Exterior angle =180−22=158∘

158∘ is not perfect multiple of 360∘.

It is not possible to have such polygon.