Polygons are the most common geometric constructions. A thorough
understanding of these basic constructions enhances the novice draftsmans
ability to draw accurately and to become more familiar with drafting
instruments. Before beginning to draw polygons, you must understand the
circumscribed and inscribed methods of drawing geometric constructions.
The circumscribed method of drawing polygonal constructions is a process by
which the geometric figure is drawn inside a circle. The circle surrounds and
defines the figure. The measurements for various planes or surfaces of the
geometric figure are drawn across the corners or horizontal diameter of the
Figure 2-32 is a square circumscribed by a circle.
Figure 2-32.A square circumscribed by a circle.
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