Solid angle
idea · 1 work · 3 mentions · 8 anchored passages
solid angle · a solid angle · angle at A · angle at D · the solid angle
in the texts
Elements
A three-dimensional angular inclination formed by more than two plane angles meeting at a point, not lying in one plane.
Any solid angle is contained by plane angles less than four right angles.
If a solid angle be contained by three plane angles, any two, taken together in any manner, are greater than the remaining one.
A solid angle is that which is contained by more than two plane angles which are not in the same plane and are constructed to one point.