You can add a Polygon by clicking on the '+' icon in the left bar and selecting ‘Polygon’ under 3D section.
Adding a Polygon
A standard polygon is automatically inserted in your experience.
Using the Properties Panel, you can adjust the following: number of sides, color, wireframe and more.
Adjusting the polygon
Example Experience - Polygons
The rules applied in the above experience are shown below
Rules - Set on example experience of Polygons