Last Updated：2022/12/24
And from hence also shall be the geodesy of the Icosaedrum. For the finding out of the heighth of the pyramis, there is the semidiagony of the side of the decangle and the halfe ray of the circle: But the side of the decangle is a right line subtending the halfe periphery of the side of the quinquangle, or else the greater segment of the ray proportionally cut.
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And
from
hence
also
shall
be
the
geodesy
of
the
Icosaedrum.
For
the
finding
out
of
the
heighth
of
the
pyramis,
there
is
the
semidiagony
of
the
side
of
the
decangle
and
the
halfe
ray
of
the
circle:
But
the
side
of
the
decangle
is
a
right
line
subtending
the
halfe
periphery
of
the
side
of
the
quinquangle,
or
else
the
greater
segment
of
the
ray
proportionally
cut.
