If it's a regular polygon then each interior angle measures 120 degrees.
it's a heptagon
The interior angles of an octagon add up to 1080 degrees
Each interior angle will measure 156 degrees
Each interior angle will measure 162 degrees
The interior angles of a 16 sided polygon add up to 2520 degrees If it's a regular polygon then each interior angle measures 157.5 degrees
If the polygon is regular, the measure of one interior angle of a 24 side polygon is 165 degrees.
Interior angles total 2520 degrees