Diedros

Diedros are a geometrical concept referring to the space enclosed by two intersecting planes. Imagine two flat surfaces meeting at an angle; the region between them is a diedro. The intersection of these two planes forms a line, which is the edge of the diedro. The angle between the two planes determines the "aperture" or "opening" of the diedro. This angle can be anything from zero degrees, where the planes are coincident, to 180 degrees, where the planes are flat and form a single plane.

Diedros are a fundamental element in three-dimensional geometry. They are also known as dihedral angles. In some contexts, particularly in surveying and geography, a diedro can refer to the angle between two intersecting lines on a map or in space. For example, the slope of a mountain face relative to a horizontal plane can be understood as a type of diedro. The concept is also present in chemistry, where a dihedral angle describes the relative orientation of atoms in a molecule.