wikiHow Calculating the Perimeter of a Square Practice Answers 1. Perimeter = 4 x 3 = 12 units 2. Perimeter = 4 x 7 = 28 centimeters 3. Perimeter = 4 x 10 = 40 meters 4. Perimeter = 4 x 2.5 = 10 feet 5. Perimeter = 4 x 12 = 48 inches 6. Perimeter = 4 x 8 = 32 centimeters 7. Perimeter = 4 x 6 = 24 meters 8. Perimeter = 4 x 1.8 = 7.2 yards 9. Perimeter = 4 x 15 = 60 centimeters 10. Perimeter = 4 x 9 = 36 inches 11. Perimeter = 4 x 5.5 = 22 units 12. Perimeter = 4 x 20 = 80 millimeters 13. Perimeter = 4 x 4.7 = 18.8 meters 14. Perimeter = 4 x 14 = 56 centimeters 15. Perimeter = 4 x 12 = 48 feet 16. Perimeter = 4 x 3.2 = 12.8 yards 17. Perimeter = 4 x 2.5 = 10 meters 18. Perimeter = 4 x 18 = 72 inches 19. Perimeter = 4 x 7.6 = 30.4 units 20. Perimeter = 4 x 11 = 44 centimeters Remember, the unit of measurement for the perimeter will be the same as the unit used for the side length. Page