Autodesk 00308-011408-9F30A User Guide - Page 160
To draw a regular polygon by specifying its center and radius
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5 (optional) Press and hold CTRL while you click the point in the next step to flip the polygon. 6 Click the adjacent corner or midpoint. To draw a regular polygon by specifying its center and radius 1 On the Draw menu, click Polygon, Regular: Center, Radius, or click the Center-Radius Polygon button on the All-In-One toolbar. A rubber-band polygon follows the pointer. 2 (optional) Click or enter a different number of sides in the Number of Segments box and press ENTER. 3 (optional) Click Inscribe or Circumscribe from the drop-down list box on the edit bar to determine if the polygon is inscribed in the reference circle or circumscribed around it. This setting determines the meaning of the radius of the polygon. 4 Enter the distance from the centerpoint to the corner of the polygon in the Radius text box on the edit bar and press ENTER if the button on the edit bar displays Inscribe, or enter the distance from the centerpoint to the midpoint of a side of the polygon in the Radius text box if the button displays Circumscribe. 5 Click a centerpoint. TIP Pressing plus (+) and minus (-) on the numeric keypad prior to picking a centerpoint causes the polygon to rotate by the angle specified in the Plus/ Minus Rotation text box in the Drawing Options dialog box. The change is reflected in the rubber-band polygon. 150 | Chapter 12 Polylines, Polygons, & Curves