Why is an arch stronger?

Related questions

1. Why were the aqueducts built?
2. Why do arches work?
3. Who owns the California Aqueduct?
4. How many aqueducts are there in the world?
5. Why was Pont du Gard built?
6. How were aqueducts made?
7. How does an aqueduct carry water?
8. What is being arch?
9. What are the parts of an aqueduct?
10. What is the meaning of the prefix Arch?

Tags

1. #natural
2. #force
3. #doesn
4. #gives
5. #effects
6. #stone
7. #namesake
8. #mortar
9. #curve
10. #strength
11. #dissipate
12. #bridge
13. #tension
14. #itself
15. #underside
16. #outward
17. #reduces
18. #greatly
19. #ability