Calculate the perimeter of a square whose side is 8 cm 6 mm.

The formula for the perimeter of a square: P = 4 * a (a is the side of the square)

In this case, a = 8 cm 6 mm. For convenience, can be converted to millimeters. One cm is 10 mm, then 8 cm 6 mm = 86 mm.

P = 4 * 86 = 344 mm

Now the answer can be translated back into centimeters and millimeters. 344 mm = 34 cm 4 mm

The perimeter of the square is 34 cm 4 mm.