Illustration of a dihedral angle bisected by a plane. "Every point in a plane which bisects a dihedral…
Illustration of dihedral angle AB (or M-AB-N) formed by planes.
Illustration of dihedral angle AB formed by planes.
Illustration of 2 equal dihedral angles.
Illustration of 3 equal dihedral angles. "Two dihedral angles have the same ratio as their plane angles."