Geometric construction of the regular decagon and pentagon inscribed in a circle, by Henry H. Ludlow.
| Country | USA |
| Brand | gizmomix |
| Manufacturer | GizmoMix |
| Binding | Electronics |
| ItemPartNumber | 5488018 |
| Model | 5488018 |
| UPCs | 634420929001 |
| EANs | 0634420929001 |
| ReleaseDate | 0000-00-00 |