This mathematics ClipArt gallery offers 13 images of polyhedral angles (those formed by the intersection of three or more planes at a common point). Included are illustrations of dihedral and trihedral angles.

Illustration of a dihedral angle bisected by a plane. "Every point in a plane which bisects a dihedral angle is equidistant from the faces of the angle."

Dihedral Angle With Bisector

Illustration of a dihedral angle bisected by a plane. "Every point in a plane which bisects a dihedral…

Illustration of a convex polyhedral angle. "The sum of the face angles of any convex polyhedral angle is less than four right angles."

Convex Polyhedral Angle

Illustration of a convex polyhedral angle. "The sum of the face angles of any convex polyhedral angle…

Illustration of dihedral angle AB (or M-AB-N) formed by planes.

Dihedral Angle

Illustration of dihedral angle AB (or M-AB-N) formed by planes.

Illustration of dihedral angle AB formed by planes.

Dihedral Angle

Illustration of dihedral angle AB formed by planes.

Illustration of polyhedral angle. "The opening of three or more planes which meet at a common point is called a polyhedral angle."

Polyhedral Angle

Illustration of polyhedral angle. "The opening of three or more planes which meet at a common point…

Trihedral angle. "The sum of any two face angles of a trihedral angle is greater than the third face angle."

Trihedral Angle

Trihedral angle. "The sum of any two face angles of a trihedral angle is greater than the third face…

Illustration of adjacent dihedral angles M-AB-N and P-AM-N made by planes.

Adjacent Dihedral Angle

Illustration of adjacent dihedral angles M-AB-N and P-AM-N made by planes.

Illustration of 2 equal dihedral angles.

Two Equal Dihedral Angles

Illustration of 2 equal dihedral angles.

Illustration of 3 equal dihedral angles. "Two dihedral angles have the same ratio as their plane angles."

Equal Dihedral Angles

Illustration of 3 equal dihedral angles. "Two dihedral angles have the same ratio as their plane angles."

Illustration of two polyhedral angles that are equal.

Equal Polyhedral Angles

Illustration of two polyhedral angles that are equal.

Illustration used to show that two trihedral angles are equal or symmetrical when the three face angles of the one are respectively equal to the three face angles of the other.

Equal trihedral angles

Illustration used to show that two trihedral angles are equal or symmetrical when the three face angles…

Illustration of two symmetrical polyhedral angles.

Symmetrical Polyhedral Angles

Illustration of two symmetrical polyhedral angles.

Illustration of two vertical dihedral angles.

Vertical Dihedral Angles

Illustration of two vertical dihedral angles.