Răspuns :
a)
A = L^2 = 2,5^2 = 6,25 dm^2
b)
3/4×12 = 36/4 = 9 dm
A = L × l = 12 × 9 = 108 dm^2
A = L^2 = 2,5^2 = 6,25 dm^2
b)
3/4×12 = 36/4 = 9 dm
A = L × l = 12 × 9 = 108 dm^2