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Polygons

May 20, 2011

Creating polygons is a simple way to draw squares, equilateral triangles, octagons, and so on. Polygons are closed polylines with between 3 and 1,024 equal-length sides.

However, you should keep one thing in mind that rectangles are created by RECTANG command rather than POLYGON.

Variety of ways can be used for creating a polygon, for example, specify the center point or one of its edges to define a polygon after you have determined the edges of polygon. If you want to draw a polygon based on another object, the following methods are provided with some given qualifications:

•      Specifying the radius of inscribed circle if the distance between the center of the polygon and the endpoint of each side (inscribed) is known

•      Specifying the radius of circumscribed circle if the distance between the center of the polygon and the midpoint of each side (circumscribed) is known

•      Specifying the length of an edge and where you want to place it

To draw a polygon by vertex

1.   Choose Draw > Polygon.

2.   Type 5 to specify five sides for the polygon.

3.   Specify the center of the polygon.

4.   Specify the vertex of the polygon.

Draw toolbar

Command line POLYGON

 The center (A) andvertex (B) Resulting polygon.

Commands Reference

BOUNDARY: Creates a region or a polyline from an enclosed area

EXPLODE: Breaks a compound object into its component objects

POLYGON: Creates an equilateral closed polyline

RECTANG: Draws a rectangular polyline

System Variables Reference

FILLMODE: Specifies whether hatches (including solid-fill), two-dimensional solids, wide polylines, are filled in

HPBOUND: Controls the object type created by the BHATCH and BOUNDARY commands

PLINEWID: Stores the default polyline width

POLYSIDES: Sets the default number of sides for the POLYGON command

SNAPANG: Sets the snap and grid rotation angle for the current viewport

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