They are both systems of measurement except that the metric system is simpler and used by the majority of the world.
Kilograms are used to express the metric measurement of mass.
Centimetres and millimetres are the metric measurements used on a metric ruler.
Meters
base on what you measure to use the metric units.
Hectares
It is a measurement of mass.
Metric system. :)
the metric system is used
Millimetres (UK spelling) is a measurement of length used by the metric system.
its a pre metric measurement of land area.
The volt.