| Answer | Crossword Clue |
|---|---|
| PHIS | Letters used by Pythagoras |
| LCS | Letters used by proofreaders. |
| PIS | Letters used by geometers |
| SECONDHANDRHOS | Used letters? |
| PIS | Letters used in geometry |
| BCE | Letters used in dating |
| BCE | Letters used in old dates |
| MAILCLIPPER | Ship used to transport letters? |
| PIS | Greek letters used in geometry |
| ETC | Letters used to avoid listing |
| QEDS | Letters used in geometry problems. |
| ATTN | Abbr. used atop business letters. |
| STENCIL | It's used for writing letters |
| QEDS | Letters used with geometry problems. |
| EXES | Letters used for crossing out. |
| EOE | Want-ad letters used in hiring |
| SWORD | Weapon used to slay the [circled letters] |
| ZEDS | Letters used to label axes in maths class |
