diédro
A diédro, also known as a dihedral angle, is a geometric concept referring to the angle between two intersecting planes. Imagine two flat surfaces that meet along a line. The space enclosed between these two planes, measured from the line of intersection outwards, forms the diédro.
In mathematics, a diédro is often defined by the line of intersection and a point on that
Diédros are fundamental in various fields of geometry and its applications. In crystallography, diédral angles are