Find the missing base of a triangle

Work backward from the area: base × height = twice the area.

1. A triangle has an area of 20 cm² and a height of 4 cm. What is the length of its base?
2. A triangle has an area of 8 cm² and a height of 4 cm. What is the length of its base?
3. A triangle has an area of 25 cm² and a height of 5 cm. What is the length of its base?
4. A triangle has an area of 4 cm² and a height of 2 cm. What is the length of its base?
5. A triangle has an area of 22 cm² and a height of 11 cm. What is the length of its base?
6. A triangle has an area of 12 cm² and a height of 12 cm. What is the length of its base?
7. A triangle has an area of 40 cm² and a height of 10 cm. What is the length of its base?
8. A triangle has an area of 11 cm² and a height of 11 cm. What is the length of its base?
9. A triangle has an area of 63 cm² and a height of 7 cm. What is the length of its base?
10. A triangle has an area of 78 cm² and a height of 13 cm. What is the length of its base?
11. A triangle has an area of 160 cm² and a height of 20 cm. What is the length of its base?
12. A triangle has an area of 171 cm² and a height of 19 cm. What is the length of its base?
13. A triangle has an area of 104 m² and a height of 13 m. What is the length of its base?
14. A triangle has an area of 72 m² and a height of 18 m. What is the length of its base?
15. A triangle has an area of 238 m² and a height of 17 m. What is the length of its base?
16. A triangle has an area of 231 m² and a height of 21 m. What is the length of its base?
17. A triangle has an area of 3552 m² and a height of 74 m. What is the length of its base?
18. A triangle has an area of 2405 m² and a height of 65 m. What is the length of its base?
19. A triangle has an area of 1134 m² and a height of 81 m. What is the length of its base?
20. A triangle has an area of 392 m² and a height of 14 m. What is the length of its base?