spherical angle
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A spherical angle is a particular
dihedral angle A dihedral angle is the angle between two intersecting planes or half-planes. In chemistry, it is the clockwise angle between half-planes through two sets of three atoms, having two atoms in common. In solid geometry, it is defined as the un ...
; it is the angle between two intersecting arcs of great circles on a
sphere A sphere () is a geometrical object that is a three-dimensional analogue to a two-dimensional circle. A sphere is the set of points that are all at the same distance from a given point in three-dimensional space.. That given point is th ...
. It is measured by the angle between the planes containing the arcs (which naturally also contain the centre of the sphere)..


See also

* Spherical coordinate system *
Spherical trigonometry Spherical trigonometry is the branch of spherical geometry that deals with the metrical relationships between the sides and angles of spherical triangles, traditionally expressed using trigonometric functions. On the sphere, geodesics are grea ...
* Transcendent angle


References

Spherical trigonometry Angle {{geometry-stub