Question

Va rog ajutatima ex.1 pleasee dau coroana

Answer 1

Răspuns:

Explicație pas cu pas:

a)P=2L+2l=2×9+2×6=18+12=30

P=2(L+l)=2(9+6)=2×15=30 cm

b)

l=14 cm   L=14+8=22cm

P=2L+2l=2×14+2×22=28+44=72 cm

P=2(L+l)=2(14+22)=2×36=72 cm

c)L=60 cm      l=L:5=60:5=12cm

P=2L+2l=2×60+2×12=120+24=144cm

P=2(L+l)=2(60+12)=2×72=144 cm

Answer 2

a)9+9+6+6=18+12=30 sau 9×2+6×2=18+12=30

b)14+14+22+22=28+44=72 sau 14×2+22×2=28+44=72

c)Nu am învățat cu dm.