Answer:
Total 9 unique triangles can be formed
Step-by-step explanation:
For triangles to be unique, length of one side can be arranged in 3 different ways
Let us L1, L2 and L3 are the three sides
Now, length of 6.5 cm can be at maximum three positions i.e L1, L2 and L3
Like wise length of 6.0 cm can be at maximum three positions i.e L1, L2 and L3
and length of 2.5 cm can be at maximum three positions i.e L1, L2 and L3
Hence, total ways of making unique triangles are
3 + 3+ 3= 9
