Răspuns :
Fie L=lungimea si l=latimea
L*l=1323
L=3l
3l*l=1323
l^2=1323/3
l^2=441=(21)^2
l=21cm
L=3*l=3*21=63cm
Perimetrul=2(L+l)=2(21+63)=2*84=168cm.
(x^2 inseamna x patrat)
L*l=1323
L=3l
3l*l=1323
l^2=1323/3
l^2=441=(21)^2
l=21cm
L=3*l=3*21=63cm
Perimetrul=2(L+l)=2(21+63)=2*84=168cm.
(x^2 inseamna x patrat)
A=L*l
L=3*l
1323=3*l*l
1323=3l²
l²=441
l=radical din 441
l=21
L=3*l=3*21=63
P=2(L+l)
P=2*(63+21)
P=2*84
P=168
L=3*l
1323=3*l*l
1323=3l²
l²=441
l=radical din 441
l=21
L=3*l=3*21=63
P=2(L+l)
P=2*(63+21)
P=2*84
P=168