I know i just make this question but this time im asking how to express correctly my doubt. Thanks for being patient.
Are there an explanation for this current issue?: is 1000m2 = 1km2 (Area of a square)? (l) lenght x (w) width = (Area of a square)2 if 10m x 100m = 1000m2 (1km2) then 100m2 = 10m x 10m 1m2 = 10cm x 10cm 1cm2 = 3.33ml x 3.33333...ml
Or Every time i said a "Square meter, kilometre or centimetre" means:
1m2 = 1m x 1m
1cm2 = 1cm x 1cm
1km2 = 1 km x 1 km
$1000 \rm{m}^2\ne 1 \rm{km}^2$.
In fact $1\rm{km}^2=1\rm{km}\cdot 1\rm{km}=1000\rm{m}\cdot 1000\rm{m}=1,000,000\rm{m}^2$