2 mm ofcourse!
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40 mm is 40 mm, a little over 1 1/2".
I don’t know why do you think I looked it up idiot are you even real
It is: 1060/2 = 530 mm
-- Find the circumference of a full circle with a diameter of 12 mm.-- The perimeter of the semi-circle is(1/2 the circumference of the full circle) + (the diameter).
The radius of a coin with diameter of 45 mm is : 45/2 = 22.5mm The circumference of a coin with diameter of 45 mm is 45*pi = 141,372mm rounded to 3 decimal places