Chances are you already need a steel ruler for your fixing and making tasks, so why not use one that can do much more than ...

An archaeologist uses a ruler to measure a piece of leather. He measures using centimetres and tenths of centimetres. The leather measures 3.3cm. A thermometer is set out in intervals of tenths of ...

To position a ruler accurately, place the point that says 0 at the start of the line you are measuring. With the ruler placed carefully on the line, measure the centimetres first, then the ...