Answer:
a
Step-by-step explanation:
1,3) no solution
2,4,5,6,7) solution
No
We know that the 3-4-5 and 9-12-15 right triangles are similar. If you add 6 units to the length of each side of both of these triangles, you obtain 9-10-11 and 15-18-21 triangles, which are not similar since 9/15 is not equal to 10/18.