- space. In the
study of the Earth's
magnetic field, the term
isogon or
isogonic line
refers to a line of
constant magnetic declination, the
variation of...
-
point of a
triangle with
largest angle at most 120° is
simply its
first isogonic center or X(13),
which is
constructed as follows:
Construct an equilateral...
-
magnetic north is east of true north, and
negative when it is to the west.
Isogonic lines are
lines on the Earth's
surface along which the
declination has...
-
defining properties of the
coordinates of a
triangle center.
Hence the 1st
isogonic center is also a
triangle center. Let f ( a , b , c ) = { 1 if a 2 > b...
-
western Pacific and is
unique in
bearing a
system of
symmetrically arranged isogonic lines—curved
lines graduated in comp****
points (quartas, each 11¼ °)—ranging...
- the
vertices to the
incenters of the
opposite faces are concurrent. An
isogonic tetrahedron has
concurrent cevians that join the
vertices to the points...
- This was the
first such
chart to be
published and the
first on
which isogonic, or Halleyan,
lines appeared. The use of such
lines inspired later ideas...
-
Information on
declination for a
region can be
represented by a
chart with
isogonic lines (contour
lines with each line
representing a
fixed declination)....
-
aureola in a
medieval illuminated m****cript Coat of arms of Guam The two
isogonic centers of a
triangle are the
intersections of
three vesicae piscis whose...
-
vertices to the
incenters of the
opposite faces are concurrent, and an
isogonic tetrahedron has
concurrent cevians that join the
vertices to the points...
