Listed below are the lengths of the sides of various triangles. Classify each triangles as acute, right or obtuse. Make sure to show all your work.
1. 14, 48, 50
2. 7.5, 6.3, 2.1
3. 2.6, 1, 2.4
4. 3/5, 17/25, 8/25
5. 7, 11, 9
6. 15, 12, 6
7. .21, .2, .15
8. 13/14, 4/7, 22/28
9. 2 2/3, 4, 1 2/3