
9514 1404 393
Answer:
Step-by-step explanation:
1. The triangles are not similar because the ratios of side lengths are not the same:
 3 : 4 : 5 ≠6 : 7 : 8
__
2. We can make the ratios be the same by multiplying the side lengths by a common value, such as 2:
 3 : 4 : 5 = 6 : 8 : 10
If triangle B had side lengths of 6, 8, 10, then it would be similar to triangle A.