A rai (Thai ไร่) is a unit of area, equal to 1,600 square metres (40 m × 40 m), used for measuring land area. Its current size is precisely derived from the metre, but is neither part of nor recognized by the modern metric system, the International System (SI). Area is a physical quantity expressing the size of a part of a surface. ... A square metre (US spelling: square meter) is by definition the area enclosed by a square with sides each 1 metre long. ... The metre or meter is a measure of length. ... The International System of Units (symbol: SI) (for the French phrase Syst me International dUnit s) is the most widely used system of units. ... Look up si, Si, SI in Wiktionary, the free dictionary. ...
The rai equals 4 ngaan or 400 dtaaraangwaa aka square waa.
It is commonly used in Thailand and equals 16 are, another unit based on the metre and as commonly used in several countries recognized though not encouraged by the SI. An are (symbol a) is a unit of area, equal to 100 square meters (10 m × 10 m), used for measuring land area. ...
References
Units of Measurement. Thailand Guru, a service of Export Quality Services Co., Ltd. Retrieved on 15 April2007. (which uses the name 'waa' instead of 'dtaaraangwaa' for the 'square waa')
April 15 is the 105th day of the year in the Gregorian calendar (106th in leap years). ... Year 2007 (MMVII) is the current year, a common year starting on Monday of the Gregorian calendar and the AD/CE era. ... April 15 is the 105th day of the year in the Gregorian calendar (106th in leap years). ... Year 2007 (MMVII) is the current year, a common year starting on Monday of the Gregorian calendar and the AD/CE era. ... April 15 is the 105th day of the year in the Gregorian calendar (106th in leap years). ... Year 2007 (MMVII) is the current year, a common year starting on Monday of the Gregorian calendar and the AD/CE era. ...
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