wikiHow Calculating the Diagonal of a Square Practice Answers 1. Approximately 7.07 cm 2. Approximately 16.97 in 3. Approximately 11.31 mm 4. Approximately 12.73 ft 5. Approximately 8.49 cm 6. Approximately 21.21 in 7. Approximately 9.90 mm 8. Approximately 14.14 ft 9. Approximately 4.24 cm 10. Approximately 28.28 in 11. Approximately 5.66 mm 12. Approximately 15.56 ft 13. Approximately 9.19 cm 14. Approximately 19.80 in 15. Approximately 12.73 mm 16. Approximately 10.61 ft 17. Approximately 2.83 cm 18. Approximately 25.46 in 19. Approximately 7.78 mm 20. Approximately 17.68 ft Note: These answers are rounded to the nearest hundredth. Page