Răspuns:
a) Aria = 16 m²
b) Aria = 0,0625 m²
c) Aria =0,0081 m²
d) Aria = 0,001225 m²
Explicație pas cu pas:
10. calculeaza (in m²) aria unui patrat cate are perimetrul de:
a) 12m P=4·l=12 m ⇒l=12:4=3 m Aria = l²=4²=16 m²
b) 1m P=4·l=1 m ⇒l=1:4=0,25 m Aria = l²=0,25²=0,0625 m²
c) 36cm P=4·l=36 cm ⇒l=36:4=9 cm
Aria = l²=9²=81 cm²=0,81dm²=0,0081 m²
d) 14cm P=4·l=14 cm ⇒l=14:4=3,5 cm
Aria = l²=3,5²=12,25 cm²=0,1225 dm²=0,001225 m²
