Question

10. calculeaza (in m²) aria unui pateat cate are perimetrul de:
a) 12m
b) 1m
c) 36cm
d) 14cm​

Answer 1

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