The values below are different wire thicknesses measured with a micrometer screw gauge. The uncertainty of it is +/- 0.01mm. Diameter/thickness of wire/mm 0.02 0.10 0.14 0.30 0.42 I need to halve (or divide by two) these values to calculate radius and hence calculate cross sectional area of the wires. What happens to the uncertainty of +/- 0.01mm. In addition what happens to the uncertainty of the radius when I square these values using the equation area of circle = πr2 ? This is for a physics investigation.