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The decimetre (or decimeter in American English; symbol: dm), is a unit of length in the International System of Units, equal to one tenth of a metre, ten centimetres, one hundred millimetres, and 3.937 inches. [1]
The centimetre (SI symbol: cm) is a unit of length in the metric system equal to 10 −2 metres ( 1 / 100 m = 0.01 m). To help compare different orders of magnitude, this section lists lengths between 10 −2 m and 10 −1 m (1 cm and 1 dm). 1 cm – 10 millimeters; 1 cm – 0.39 inches; 1 cm – edge of a square of area 1 cm 2
For example; three feet, two inches can be written as 3 ′ 2″. ... 2.54 centimeters (1 inch is exactly 2.54 cm) 25.4 millimetres (1 inch is exactly 25.4 mm)
This differs from many older systems in which the ratio of different units varied. For example, 12 inches is ... due to gravity to be 980.665 cm/s 2, ...
Several national forms existed, with different lengths, including the Scottish ell (≈37 inches or 94 centimetres), the Flemish ell [el] (≈27 in or 68.6 cm), the French ell [aune] (≈54 in or 137.2 cm), [9] the Polish ell (≈31 in or 78.7 cm), the Danish alen (24 Danish inches or 2 Danish fod: 62.7708 cm), the Swedish aln (2 Swedish fot 59 ...
one Amsterdam inch (Amsterdamse duim) was 2.573 93 cm; one Gelderland or Nijmegen inch (Gelderse of Nijmeegse duim) was 2.7 cm; one Rijnland inch (Rijnlandse duim) was 2.61 cm; When the "Dutch metric system" (Nederlands metriek stelsel) was introduced in 1820 the word duim was used for the centimeter, but
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A ruler with two linear scales: the metric and imperial.It includes shorter minor graduations and longer major graduations. A graduation is a marking used to indicate points on a visual scale, which can be present on a container, a measuring device, or the axes of a line plot, usually one of many along a line or curve, each in the form of short line segments perpendicular to the line or curve.