wikiHow Triangle Perimeter Practice Problems 1. Find the perimeter of a triangle with sides of 5 cm, 7 cm, and 8 cm. 2. A triangle has sides of 9 cm, 12 cm, and 15 cm. What is its perimeter? 3. Find the perimeter of a triangle with sides of 4 cm, 9 cm, and 12 cm. 4. A triangle has sides of 6 cm, 8 cm, and 10 cm. What is its perimeter? 5. Find the perimeter of a triangle with sides of 11 cm, 15 cm, and 18 cm. 6. A triangle has sides of 3 cm, 4 cm, and 5 cm. What is its perimeter? 7. Find the perimeter of a triangle with sides of 7 cm, 10 cm, and 12 cm. 8. A triangle has sides of 5 cm, 12 cm, and 13 cm. What is its perimeter? 9. Find the perimeter of a triangle with sides of 8 cm, 15 cm, and 17 cm. 10. A triangle has sides of 6 cm, 9 cm, and 12 cm. What is its perimeter? 11. Find the perimeter of a triangle with sides of 10 cm, 24 cm, and 26 cm. 12. A triangle has sides of 13 cm, 14 cm, and 15 cm. What is its perimeter? 13. 14. Find the perimeter of a triangle with sides of 7 cm, 24 cm, and 25 cm. 15. A triangle has sides of 5 cm, 8 cm, and 11 cm. What is its perimeter? 16. Find the perimeter of a triangle with sides of 15 cm, 20 cm, and 25 cm. 17. A triangle has sides of 12 cm, 16 cm, and 20 cm. What is its perimeter? 18. Find the perimeter of a triangle with sides of 8 cm, 10 cm, and 12 cm. 19. A triangle has sides of 7 cm, 9 cm, and 12 cm. What is its perimeter? 20. Find the perimeter of a triangle with sides of 9 cm, 12 cm, and 16 cm. 21. A triangle has sides of 8 cm, 13 cm, and 17 cm. What is its perimeter? Page