| Giver | Post | Date |
| Gbv11 | Re: In the xy-plane, points A, B and C are not on the same line. | 11-Nov-2014 |
| avalanche69 | Re: In the xy-plane, points A, B and C are not on the same line. | 30-May-2014 |
| Titah | Re: In the xy-plane, points A, B and C are not on the same line. | 22-Feb-2013 |
| WoundedTiger | Re: In the xy-plane, points A, B and C are not on the same line. | 20-Jan-2013 |
| fozzzy | Re: In the xy-plane, points A, B and C are not on the same line. | 19-Jan-2013 |