This is the 6852nd most frequent Russian word.
ар
"Ар" is a metric unit of area equal to 100 square meters (also known as an are).
The word 'ар' here is used as a unit of measurement for area that equals to 100 square meters.
У нас сад площадью в один ар, где растут яблоки.
We have a garden with an area of one are, where apples grow.
The word 'ар' here is used in academic context as a metric unit in land measurement.
В математике ар используется для измерения площади земельных участков.
In mathematics, the are is used for measuring the area of land plots.
The word 'ар' is described as a standardized unit in geographical demarcation.