Sheraton, Thomas; Bensley, Thomas; Mathews, James; Bensley, Thomas [Oth.]; Mathews, James [Oth.]; Terry, George [Oth.]; Jordan, Jeremiah Samuel [Oth.]; Wayland, L. [Oth.]: The Cabinet-Maker And Upholsterer's Drawing-Book: In Three Parts (London: Printed For The Author, By T. Bensley; And Sold By J. Mathews ... C. Terry ... J.S. Jordan ... L. Wayland ... And By The Author, 1793)

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from the center two parts, and fweep the arch 2.8. Laftly, ex-
tend the compares from 8 to 12, which, as before, will be the
femi-diameter of a circle that wrill contain the given fide 12.1
eight times, by which an Odagon may be formed.
In the fame manner proceed with the other to a circle that
will contain the given fide twelve times, as the largeft circle
in the figure evidently does, as marked by the figures 1,2, 3, <kc.
In the preceding directions for drawing the Polygons, their
fides are previoully determined as to their length, but the circle
that will contain the fides fo many times, is required to be found.
We fhall now change the order, and propofe a given circle, in
which fhall be infcribed any Polygon of the above kinds.
Prob. X. Fig. 21.
Therefore a circle being given, let it be required to find
the fide of a Pentagon that may be infcribed within the given
circle.
Operation.—Let the line 9.5 be the diameter of the given
circle.
Bifedt the diameter, and draw a line at right angles with it;
then with the radius J- 9 defcribe the circle.
II Second,