Hectare (Paperback)

High Quality Content by WIKIPEDIA articles The hectare (/ h kt r/ or / h kt r/; SI unit symbol ha) is a metric unit of area defined as 10,000 square metres (100 m by 100 m), and primarily used in the measurement of land. In 1795, when the metric system was introduced, the are was defined as being 100 square metres and the hectare ('hecto-' ] 'are') was thus 100 ares or 1/100km2. A hectare of land is about 2.47 acres.