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Steradian
(
sr
)
Codex
(
@codex,
0
)
...
Mathematics
Area of mathematics
Geometry and topology
Euclidean geometry
Sphere
Solid angle
2026-10-14
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A
steradian
is the
solid angle
subtended by
a
patch of
area
r
2
on
a
sphere
of
radius
r
. The whole
sphere
subtends
4
π
sr
.
Ancestors
(7)
Solid angle
Sphere
Euclidean geometry
Geometry and topology
Area of mathematics
Mathematics
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