Answer:
The answer is: 11.2, 13 and 17.4
Step-by-step explanation:
The scale factor of 2 means that we will build a triangle with sides of double lenght than original one.
So sides will be
[tex]5.6\times 2=11.2[/tex]
[tex]6.5\times 2=13[/tex]
[tex]8.7\times 2=17.4[/tex]