Răspuns :
P=2l+2L=2*4+2*5=8+10=18
A=l*L=4*5=20
7,23dam²=72300dm²
7,23dam²=0,0723hm²
A=l*L=4*5=20
7,23dam²=72300dm²
7,23dam²=0,0723hm²
trebuie sa sti ca perimetrul este L+l
iar aria L×l
P=5+4=9m
A=5×4=20m
7,23dam²=72300dm²=0,0723hm²
iar aria L×l
P=5+4=9m
A=5×4=20m
7,23dam²=72300dm²=0,0723hm²