There is no such thing as a hectogon.
A heptagon has 7 vertices.
Each exterior angle of a regular heptagon is 360/7 degrees.
So each interior angle is 180 - 360/7 = 128.57 degrees (approx).
Each interior angle will measure 162 degrees
It is: 180-exterior angle = interior angle because there are 180 degrees on a straight line
120°
A regular trapezoid (!) is a square. And each interior angle of a square is 90 degrees.
Each interior angle of a regular 8 sided octagon measures 135 degrees
(8-2)*180=1080
Each interior angle will measure 162 degrees
The measure of each interior angle of a fifteen sided regular polygon, a pendedecagon, is 156o.
It is: 180-exterior angle = interior angle because there are 180 degrees on a straight line
144
120°
135 Each interior angle of a regular octagon measures 135 degrees.
A regular trapezoid (!) is a square. And each interior angle of a square is 90 degrees.
Each interior angle of a regular 8 sided octagon measures 135 degrees
Each interior angle of a regular 9 sided nonagon measures 140 degrees
A regular polygon having an interior angle measure of 168o has 30 sides and is called a triacontagon.
It will have 14 sides and each interior angle will measure 2160/14 degrees