What are the common units of length and area?

Commonly used length units are: millimeter, centimeter, decimeter, etc.

Commonly used area units are: square centimeter, square decimeter, square meter, etc.

1, also known as millimeter (or millimeter), is the unit of length and rainfall, abbreviated as mm in English. 10 mm is equivalent to 1 cm, 100 mm is equivalent to 1 decimeter, and 1000 mm is equivalent to 1 meter (which means milli).

2. centimeter is the unit of length measurement, which is equal to one hundredth of one meter. The unit of length is abbreviated as cm,1cm =1100m. 1cm (cm) = 10mm (mm) =0. 1dm (decimeter) =0.0 1m (meter).

3. The decimeter (English dm) is one of the metric units of length, and 1 decimeter is equivalent to one tenth of 1 meter. Ten centimeters equals one decimeter, and ten meters equals one meter.

4. Square centimeter is a universal unit for mathematical calculation and area. The symbol is c㎡ English: Square centimeter is the metric unit of area, which is defined as "the area of a square with a side length of 1 cm".

5. Square decimeter (symbol dm? ) is the metric unit of area, which is defined as "the area of a square with a side length of 1 decimeter".

6, square meters (m? Square meters are metric units of area. It is defined as the area of a square with a side length of 1 m. In life, square meters are usually referred to as "square meters" or "squares" for short. Hongkong and Taiwan Province are called "square meters".

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