The measure of each interior angle of a fifteen sided regular polygon, a pendedecagon, is 156o.
The interior angle of an octdecagon, an 18 sided regular polygon, is 160o.
A 16 sided polygon
Providing that it is a regular 38 sided polygon then each interior angle will measure: 170o31'34.74''
The interior angles of an 11 sided polygon add up to 1620 degrees
Providing that it is a regular polygon then each interior angle will measure 160 degrees
If the polygon is regular, the measure of one interior angle of a 24 side polygon is 165 degrees.
51º per interior angle
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
Interior angles total 2520 degrees