In this autocad tutorial you’ll learn how to draw polygon.
1. Open a new drawing. Click New 
2. Make sure Ortho mode is ON, (it ON when it glow in blue)
click the icon to turn it ON or OFF. (or press F8 to toggle)
Type z [Space bar], e [Space bar]. This will zoom extents your drawing area.
3. Click Draw>Polygon,
4. Enter number of sides, type 6 [Enter].
5. Specify center of the polygon, type 0,0 [Enter].
6. Click on Circumscribed about circle.
Polygon tips
7. Move cursor upward and type 1 as polygon radius.
Done.
