A rood is an old and largely obsolete unit of land area measurement. It was historically used in some English-speaking countries, particularly in the United Kingdom and Ireland, but it is not commonly used today, and its use in official measurements has been largely phased out.
In the traditional system, one rood is equal to one-quarter of an acre. This means that there are 4 roods in one acre. Converting to modern units, one rood is approximately 1,011.71 square meters (m²) or 0.101171 hectares (ha).
The term "rood" is often associated with medieval land measurement systems and was used in land and property transactions in the past. While it may occasionally appear in historical documents or literature, it is no longer a standard unit of measurement for land area in most countries.
A square inch (sq in or in²) is a unit of area commonly used in the United States and other countries that use the imperial system of measurements. It is defined as the area of a square with sides that each measure one inch in length.
In terms of square centimeters, one square inch is approximately equal to 6.4516 square centimeters (cm²).
Square inches are used in various applications, especially for measuring small areas, such as the size of a sheet of paper, the dimensions of electronic devices, or the area of specific objects or surfaces in everyday life.