plsssss! dau coroanaaaaa

Răspuns:
2.A=?
A=[tex]l^{2}[/tex]
P=24[tex]\sqrt{2}[/tex]=4*l => l=([tex]24\sqrt{2}[/tex])/4=6[tex]\sqrt{2}[/tex]cm
=>A=[tex](6\sqrt{2}) ^{2}[/tex]=36*2=72[tex]cm^{3}[/tex]
3. P=30cm =>l=10cm
A=([tex]l^{2}[/tex][tex]\sqrt{3}[/tex])/4=(100[tex]\sqrt{3}[/tex])4=25[tex]\sqrt{3}[/tex] [tex]cm^{3}[/tex]
6. d1=40cm, d2=30cm
h=2,4dm=24cm
A=(d1*d2)/2=(40*30)/2=600 cm cub
A=l*h =>l=A/h=600/24=25cm
Explicatie:
Problemele 1,4,5 sunt pe fisier.
Sper ca te-am ajutat!