最終更新日:2024/07/28
(geometry) A figure formed by two rays which start from a common point (a plane angle) or by three planes that intersect (a solid angle).
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angle
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元となった辞書の項目
angle
noun
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(geometry)
The
measure
of
such
a
figure.
In
the
case
of
a
plane
angle,
this
is
the
ratio
(or
proportional
to
the
ratio)
of
the
arc
length
to
the
radius
of
a
section
of
a
circle
cut
by
the
two
rays,
centered
at
their
common
point.
In
the
case
of
a
solid
angle,
this
is
the
ratio
of
the
surface
area
to
the
square
of
the
radius
of
the
section
of
a
sphere.
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