When
the perimeters of both figures will be equal.
Step-by-step explanation:
Step 1:
The triangle has side lengths of
and
.
The perimeter of the triangle is the sum of the lengths of the sides.
The perimeter of the triangle 
Step 2:
The perimeter of the hexagon is 6 times its side length. The side length 
The perimeter of the hexagon
Step 3:
To determine the value at which both the perimeters are equal, we equate both the equations to each other.

So when
the perimeters of both figures will be equal.