Polygons do not have internal angels or angels of any sort, for that matter. If you want to ask questions about angels, please direct them to the local clergyman who practices a faith commensurate with your personal values.
The sum of the measures of the internal angles of an -gon is given by . If the polygon is a regular polygon, each of the internal angles measures:
For you, . Do the arithmetic.
My calculator said it, I believe it, that settles it