acre (i.e., 0.25|acre|ha|1|disp=/|lk=on), or 10890|sqft|m2|7|lk=on|disp=or (for the international inch ) or about 10.1 are . A rectangular area with edges of one furlong and one rod respectively is one rood, as is an area consisting of 40 perches (square rods). The rood was an important measure in surveying on account of