Răspuns :
Pp=Pd= 24
Pd=2L+2l
L=2l
2*2l+2l=24
4l+2l=24
6l=24
l=4
L=2*4=8
a)Ap= l²
Pp=24
Pp=4l => 4l=24 <=> l=6
Ap= 6²=36 cm²
b)A=L*l= 4*8=32 cm²
Pd=2L+2l
L=2l
2*2l+2l=24
4l+2l=24
6l=24
l=4
L=2*4=8
a)Ap= l²
Pp=24
Pp=4l => 4l=24 <=> l=6
Ap= 6²=36 cm²
b)A=L*l= 4*8=32 cm²
Patratul are 4 laturi egale deci:
latura = 24:4=6cm
A=latura la puterea a 2-a =6 la a 2-a = 36cm patrati
La dreptunghi:
L=lungime l=latime
2L+2l=24cm
L+l=12cm L=2l
3l=12cm l=4cm => L=8cm
A=Lxl=8x4=32cm patrati
latura = 24:4=6cm
A=latura la puterea a 2-a =6 la a 2-a = 36cm patrati
La dreptunghi:
L=lungime l=latime
2L+2l=24cm
L+l=12cm L=2l
3l=12cm l=4cm => L=8cm
A=Lxl=8x4=32cm patrati