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Circumference = Pi (3.14) times Diameter (C=pD)
Diameter = 2 times the Radius (D=2R) or Circumference divided by Pi
Area = Pi times the radius squared (A=pr2)
So, 4 / 3.14 = 1.27. The diameter of a 4mm nail is 1.27mm.
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∙ 13y ago
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