Answer:
First option is the right choice.
Step-by-step explanation:


Best Regards!
Answer:

Step-by-step explanation:

I hope I helped you^_^
Triangles ABC and MNO are similar:
1.) same shape-different size
2.) corresponding angles are equal-both triangles are isosceles triangles.
3.) corresponding sides are in the same ratio 12/7.5=8/5=1.6
Answer:
2/3 is the constant of proportionality.