Tha will depend on how many sides the regular polygon has.
Providing that it is a regular octagon then each interior angle will measure 135 degrees
Each interior angle measures 140 degrees
Each interior angle measures 140 degrees
Each interior angle measures 135 degrees
The measure of each interior angle of a fifteen sided regular polygon, a pendedecagon, is 156o.
A regular trapezoid (!) is a square. And each interior angle of a square is 90 degrees.
135 Each interior angle of a regular octagon measures 135 degrees.
Each interior angle will measure 162 degrees
Each interior angle of a regular 8 sided octagon measures 135 degrees
120°.
120
144˚