Index - topics beginning with A.
| Topic area | Sub-topic |
| Absolute values. | Main page. |
| Algebra | All topics. |
| Annuities. | Financial maths. |
| Anti-differentiation (Integration). | Integration Main page - various aspects. |
| Arc length and areas of sector/segment. | Trigonometry - Main page. |
| Area and perimeter. | See Measurement - main page. |
| Arithmetic sequences and series. | Introduction to arithmetic and geometric sequences and series. |
| The nth term of an arithmetic sequence. | |
| The sum of an arithmetic series. | |
| Mixed questions with Geometric series. | |
| Auxilliary angles. | Trigonometry - equations |