Calculate the perimeter of the rectangle if the value of the sum of two adjacent sides of the rectangle is 6 cm 5 mm.

The perimeter of a rectangle is equal to the sum of the lengths of all its sides. Moreover, since the opposite sides of this figure are equal, the perimeter can be calculated knowing the lengths of only two sides or their sum.

The perimeter of the rectangle will be the sum of the adjacent sides multiplied by 2.

Accordingly, if the sum of the adjacent sides of the rectangle is 6 cm 5 mm, we need to multiply this value by two:

6.5 * 2 = 13 (cm)

Answer: the perimeter of a rectangle with the sum of the lengths of adjacent sides 6 cm 5 mm is 13 centimeters.