DOI Page / Citation link:
https://doi.org/10.11588/diglit.62828#0340
( )
A hexagon may be fo placed as to have two fides parallel,
and the other four oblique, as Fig. 16, Plate XIX. or it may have
all its fides oblique.
An odagon may have two Tides parallel to the pidure,
confequently there will alfo be two perpendicular to it, and
the remaining four will be each of them oblique, as Fig. 18,
Plate XIX. The odagon in this fituation, therefore, introduces
all the variety of politions of lines that can exift in a pidure,
when the figure is fuppofed to be on the ground plane, or per-
pendicular to the pidure; and fince the theory of lines parallel,
perpendicular, and oblique to the ground line, &c. has already
been confidered and applied to pradice in the preceding fedion,
in the reprefentation of geometrical fquares and of cubes, no-
thing is requifite here, but to apply the fame principles to the
reprefentation of polygonal figures.
The moft ufeful of thefe are the hexagon and odagon;
which, for brevity’s fake, I fliall confine myfelf to, taking it
for granted that, after the learner is acquainted wTith thefe, he
will be able to delineate any other, from a pentagon to a duo-
decagon, as it may be found requifite.
Prob
A hexagon may be fo placed as to have two fides parallel,
and the other four oblique, as Fig. 16, Plate XIX. or it may have
all its fides oblique.
An odagon may have two Tides parallel to the pidure,
confequently there will alfo be two perpendicular to it, and
the remaining four will be each of them oblique, as Fig. 18,
Plate XIX. The odagon in this fituation, therefore, introduces
all the variety of politions of lines that can exift in a pidure,
when the figure is fuppofed to be on the ground plane, or per-
pendicular to the pidure; and fince the theory of lines parallel,
perpendicular, and oblique to the ground line, &c. has already
been confidered and applied to pradice in the preceding fedion,
in the reprefentation of geometrical fquares and of cubes, no-
thing is requifite here, but to apply the fame principles to the
reprefentation of polygonal figures.
The moft ufeful of thefe are the hexagon and odagon;
which, for brevity’s fake, I fliall confine myfelf to, taking it
for granted that, after the learner is acquainted wTith thefe, he
will be able to delineate any other, from a pentagon to a duo-
decagon, as it may be found requifite.
Prob