| Giver | Post | Date |
| Nayem117 | Re: GRE Math Challenge #21-In circle with centre O, BC > CD | 05-Jul-2023 |
| pattypat | Re: GRE Math Challenge #21-In circle with centre O, BC > CD | 26-Nov-2022 |
| fabiha22 | Re: GRE Math Challenge #21-In circle with centre O, BC > CD | 31-Mar-2020 |
| sandy | Re: GRE Math Challenge #21-In circle with centre O, BC > CD | 07-Mar-2018 |