You would observe the length of objects.
None. A metric ruler would not show inches, as these are not a metric measurements. It would show millimetres and centimetres.
To measure the mm of an item you would need to use a metric ruler. The metric ruler has cm and mm on it.
Metric ruler
A ruler
0.03125 = 1/32 inches.
On a ruler using the metric system, you would typically find units such as centimeters and millimeters. These units are used for measuring length and are based on powers of ten for easy conversion. The metric system is widely used in many countries around the world.
A small ruler such as one used in an office or school would be set out in Millimetres and Centimetres.
A metric ruler.
A ruler.
You would use a ruler and measure in millimeters or centimeters.
a balance and a metric ruler.
ruler * * * * * A ruler is not a unit! Most people would use centimetres, though retailers may use millimetres.