Consider the given shape.

Notice that the given shape is a square.

We know,

Perimeter of a square = 4 × side

Side of the given square = 26 centimeters​

Perimeter of the square = 4 × 26                              

                                       = 104

As the lengths are measured in centimeters, the perimeter is also measured in centimeters.

So, the perimeter of the given square is 104 centimeters​.