5cm=50mm
5 cm = 50 mm
50mm0.00005
50
50mm
5cm
50mm = 5cm
5cm
5cm = 50mm
If you mean that the perimeter adds up to 5cm then make each side 1cm long. If you want the 5cm length to be from point to point, make each side 1 mm long. If you want the 5cm length to be from point to opposite side, make each side .8 mm long.
That's 50mm. 2X2.5cm=5cm=50mm
Since it take 10 mm to make 1 cm, then that would be 50mm x 75mm.