3-Geometry-Solid-Angle

solid angle

Two solids meet at an angle {solid angle}| measured as a wedge. Solid angle measure is in steradians. Solid angle is at vertex.

dihedral angle

Two angles {dihedral angle}| are where two planes intersect. The smaller angle is angle size {inclination}. Dihedral angle lies between line in each plane perpendicular to intersection line {vertex, dihedral angle}. Dihedral angle is angle between normals to the planes. Dihedral angle measure is in radians.

plane angle

Two planes meet at an angle {plane angle} measured between two lines perpendicular to plane-intersection line. Plane angle measure is in radians.

polyhedral angle

Edges and faces at vertices make solid angles {polyhedral angle}|.

trihedral angle

Three lines can meet at one point, defining three planes {trihedral angle}|. Trihedral-angle ray relative directions can be left-handed or right-handed.

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3-Geometry-Solid

Drawings

Drawings

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Date Modified: 2022.0225