Answer:
no
Step-by-step explanation:
Given 2 sides of a triangle then the third side x is
difference of 2 sides < x < sum of 2 sides , that is
12 - 6 < x < 12 + 6 , that is
6 < x < 18
For the perimeter to be 36 then the then the third side would be 18
6 + 12 + 18 = 36
However x < 18
So the perimeter cannot be 36
