1.
P = 4 l => l = 24 ÷4 = 6 cm.
Cum latura l = 6 cm, aria =
A ( aria ) = l^2 = l×l => A = 6×6 = 36 cm.
Diagonala patratului = l√2 => Diagonala = 6√2
2.
Diagonala = 13 √2 => l ( latura ) = 13 cm
P = 4 *l => P = 4 * 13 = 52 cm.
Aria ( A ) = l *l ( l ^2 ) => A = 13 * 13 = 169 cm.
4.
MOL = triunghi echilateral => toate laturile sunt egale.
Cum MO = 15 cm => ML = OL = MO = 15 cm.
P = ML + OL + MO = 15 +15 + 15 = 45 cm
Sau putem face direct 15 *3 = 45.
Aria ( A ) = l^2 √3 /4 => A = 15 ^2 √/4 => A = 225√3/4 => A = ~ 56√3.
