| 2025-08-10 | An ellipse has two of these |
| 2024-12-14 | Central points |
| 2023-10-15 | Two inside an ellipse |
| 2023-03-19 | Centers of attention |
| 2022-06-26 | Pair in an ellipse |
| 2021-11-26 | Duo in an ellipse |
| 2021-07-01 | Points of interest |
| 2020-12-02 | A hyperbola has two |
| 2020-06-23 | Points of convergence |
| 2019-03-27 | Hubs |
| 2015-12-07 | Centers of attention |
| 2012-12-13 | What an ellipse's major axis passes through |
| 2011-08-02 | Centers of attention |
| 2011-03-31 | Two key points on an ellipse's major axis |
| 2010-05-27 | An ellipse has two |
| 2009-11-30 | Central points |
| 2009-06-23 | Centers of circles |
| 2009-06-21 | Pair in an ellipse |
| 2008-08-27 | Centers of attention |
| 2008-07-27 | A hyperbola has two |
| 2008-06-25 | Meeting points |
| 2008-03-10 | Places where lines meet |
| 2007-11-07 | Points that may have rays |
| 2007-02-11 | Meeting points |
| 2003-02-17 | An ellipse has two of them |
| 2001-04-30 | Central points |
| 2000-10-13 | Earthquakes' points of origin |
| 2000-08-31 | Convergence points |
| 2000-05-25 | Origins of earthquakes |
| 1998-04-26 | Central points |
| 1997-02-17 | Points of convergence |
| 1995-11-09 | Geometry points |