| Giver | Post | Date |
| YashZ | O is the center of the circle. If line segment DC has length | 28-Aug-2022 |
| SusieSushi | O is the center of the circle. If line segment DC has length | 07-Nov-2019 |
| Carcass | O is the center of the circle. If line segment DC has length | 09-Aug-2019 |