3700ha
0,0059 ha
3205ha
70000m vuông
80 ha
50 dam vuông
3 km vuông 97 ha
6,07 km vuông
\(37km^2=3700ha\)
\(590000cm^2=0,59ha\)
\(32km^25ha=3205ha\)
\(7ha=70000m^2\)
\(\frac{4}{5}km^2=80ha\)
\(\frac{1}{2}ha=200000dm^2\)
\(397ha=3km^297ha\)
\(6km^27ha=6,07km^2\)