Summary

Poly gauge in the manner of Veritas or WoodPeckers Tools.
5 differents angles (45°, 54°, 60°, 67.5° and 75°) to produce frames with 4, 5, 6, 8 or 12 sides.

EDIT 2019-03-20

Reorientation of part
Adding StandUp support

EDIT 2019-03-19

Already existing design :
https://www.thingiverse.com/thing:3242275

Just saw it now...

Print Settings

Printer Brand:

Prusa

                                            Printer: 
                     
Prusa Clone

Rafts:

                                            Supports: 
                     
No

Resolution:

0.2

                                            Infill: 
                     
20

Filament: Sunlu PLA
Blue

                    
                        Notes: 
                    
This abviously need to be flat printrnI printed it in 0.4mm to validate the design.rnrnI got a poor printer so all angles are not perfect but I don't know if it due to the printer or the design.rnSo if someone want to print it on a really good calibrated printer and tell us about in comments it could be great.

gauge

truth

woodpeckers