Question

Make the plural form of the following words : Index ; formula ; focus ; matrix ; radius ; phenomenon ; appendix ; crisis ; criterion.

Answer 1

Ответ:

Indecies, formulas, focuses, matrices, radiuses, phenomenons, appendices, crisis, criterions

Answer 2

Here are the plural forms of the words you provided:

1. Index → Indexes or Indices
2. Formula → Formulas
3. Focus → Focuses or Foci
4. Matrix → Matrices
5. Radius → Radii
6. Phenomenon → Phenomena
7. Appendix → Appendices or Appendixes
8. Crisis → Crises
9. Criterion → Criteria