The unit of length metre (m) was first defined by the French Academy of Sciences in 1790. One meter is equal to one ten-millionth of the distance between the equator and the North Pole, along a meridian
. The final version of the Ur-Meter was made of platinum and was archived in the French National Archives. The definitions changed slightly over the centuries. It was not until 1983 that the version of a metre now in use was derived from the speed of light in a vacuum. Namely, it is the distance that light travels in a time interval of 1/299,792,458 of a second
(SI), is divided into 10 decimetres (dm) or 100 centimetres (cm), one centimetre into 10 millimetres (mm), one millimetre into 1.Apart from the metre, there are other units of length used in Anglo-Saxon countries, such as the mile, the yard, feet or inches.
One mile is equal to 1.609 km or 5,280 feet (ft). One metre is equal to 1.0936 yards, 3.28 feet or 39.37 inches.