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Measurement Using A Metric Ruler

A metric ruler is use to measure centimeter and

1 centimeter (cm) = 10 millimeters (mm)

A centimeter is a unit of length in the metric system. 
There are 2.54 centimeters in an inch.

A 12 inch ruler is about 30 cm long.


Example of a centimeter (cm) ruler

There are 5 cm on the ruler above. There are 10 mm
between each cm



The line segment above is 2 centimeter long or 20

The line segment above = 3 mm


The line segment above = 1-cm and 1-mm or 11 mm

This can also be read as 1.1 cm


How to Read a inch Ruler-  customary unit