The measure of any interior angle of a convex regular n-gon is radians or degrees.
From the en.wikipedia.org
The angle supplementary to the interior angle is called the exterior angle.
From the en.wikipedia.org
The exterior angle is the supplementary angle to the interior angle.
From the en.wikipedia.org
The dihedral angle is the interior angle between any two face planes.
From the en.wikipedia.org
A neusis construction of the interior angle in a regular heptagon.
From the en.wikipedia.org
If the corresponding interior angle is a reflex angle, the exterior angle should be considered negative.
From the en.wikipedia.org
An angle that is part of a simple polygon is called an interior angle if it lies on the inside of that simple polygon.
From the en.wikipedia.org
The points of intersection of the interior angle bisectors of ABC with the segments BC,CA,AB are the vertices of the incentral triangle.
From the en.wikipedia.org
A sharp interior angle in this region can interact with the boundary layer flow causing a drag inducing vortex, negating some of the benefit of the winglet.