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100 metres X 100 metres = 1 hectare
There are 100 ares in a hectare which is 2.471 acres. An are is 100 m2 and a hectare is 10 000 m2
1 HA is 100 * 100 m2. So in m2 it is 100*100= 10000m2
One square kilometer is 100 hectares.
0.01 km².