Click the Regular Polygon Tool (keyboard shortcut CTRL+SHIFT+Y) to display the regular polygon drawing buttons in the ribbon at the top of the Designer window. These buttons are used to draw polygon objects from opposite corners or from a single side. You also can draw a regular polygon from center to corner, from center to side, and from just one side
There are three ways to draw a polygon: the To Corner, To Side, and Single Side methods. You can use the method that suits your needs or preferences.
If you want to draw irregular polygons (polygons in which not all the sides are equal), use the Compound Line Tool.
The To Corner method lets you draw polygons from the center to any particular corner.
The To Side method lets you draw polygons from the center to a side.
The Single Side method lets you create polygons by drawing only one side. Designer draws the other sides.
Click the Single Side button 
to draw one edge of the polygon. The rest of the polygon is drawn automatically. Release the mouse button when you finish.
