area
Area is the quantity that expresses the extent of a region on the plane or on a curved surface. The area of a plane region or ''plane area'' refers to the area of a shape
A shape or figure is a graphics, graphical representation of an obje ...
, equal to 400
square metre
The square metre ( international spelling as used by the International Bureau of Weights and Measures) or square meter (American spelling) is the unit of area in the International System of Units (SI) with symbol m2. It is the area of a square w ...
s (20 m × 20 m), used for measuring land or property area. Its current size is precisely derived from the
metre
The metre (British spelling) or meter (American spelling; see spelling differences) (from the French unit , from the Greek noun , "measure"), symbol m, is the primary unit of length in the International System of Units (SI), though its pref ...
, but is neither part of nor recognized by the modern
metric system
The metric system is a system of measurement that succeeded the Decimal, decimalised system based on the metre that had been introduced in French Revolution, France in the 1790s. The historical development of these systems culminated in the d ...
rai
RAI – Radiotelevisione italiana (; commercially styled as Rai since 2000; known until 1954 as Radio Audizioni Italiane) is the national public broadcasting company of Italy, owned by the Ministry of Economy and Finance. RAI operates many ter ...
or 100
tarang wa A tarang wa ( th, ตารางวา, , ) or square wa, sometimes transliterated as 'waa' or 'wah' is a unit of area used in Thailand for measuring land or property. It is defined as the area of a square whose sides measure exactly one wa (two ...
( th, ตารางวา) ''aka'' square wa ( th, วา), very nearly 1/10 of an
acre
The acre is a unit of land area used in the imperial
Imperial is that which relates to an empire, emperor, or imperialism.
Imperial or The Imperial may also refer to:
Places
United States
* Imperial, California
* Imperial, Missouri
* Imp ...
. ''Ngan'' also means ''work''.
It is commonly used in
Thailand
Thailand ( ), historically known as Siam () and officially the Kingdom of Thailand, is a country in Southeast Asia, located at the centre of the Indochinese Peninsula, spanning , with a population of almost 70 million. The country is bo ...
and equals four
are
Are commonly refers to:
* Are (unit), a unit of area equal to 100 m2
Are, ARE or Åre may also refer to:
Places
* Åre, a locality in Sweden
* Åre Municipality, a municipality in Sweden
**Åre ski resort in Sweden
* Are Parish, a municipa ...
, another unit based on the metre and as commonly used in several countries recognized though not encouraged by the SI.
As for many terms normally written in
Thai alphabet
The Thai script ( th, อักษรไทย, ) is the abugida used to write Thai, Southern Thai and many other languages spoken in Thailand. The Thai alphabet itself (as used to write Thai) has 44 consonant symbols ( th, พยัญชน ...
, transliteration into English language caused a spelling variant, ''ngaan''.
See also
*
Thai units of measurement
Thailand adopted the metric system on 17 December 1923.1 E+2 m² for a comparison with other areas