10 m X
10
m
1 a
4 m x
m
2000 m X
m

Zadanie
1 a = 100 m²
1 a = 10 m · 10 m = 100 m²
1 a = 4 m · 25 m = 100 m²
1 a = 2000 m · 0,05 m = 100 m²