Răspuns :
aria = Lungimea x latimea
lungimea = 3 x latimea
aria = 3 l x l = 3 l²
675 = 3 l²
225 = l²
l = √225 = 15 cm
L = 3l = 45
Perimetrul = 2 ( L+l) = 2 ( 45 +15) = 2 x 60 = 120 cm
lungimea = 3 x latimea
aria = 3 l x l = 3 l²
675 = 3 l²
225 = l²
l = √225 = 15 cm
L = 3l = 45
Perimetrul = 2 ( L+l) = 2 ( 45 +15) = 2 x 60 = 120 cm
L = 3l
A = 675 = L × l
675 = 3l × l
675 = 3l^2
225 = l^2
l = 15 cm
L = 45 cm
P = 2L + 2l
P = 90 + 30
P = 120 cm
A = 675 = L × l
675 = 3l × l
675 = 3l^2
225 = l^2
l = 15 cm
L = 45 cm
P = 2L + 2l
P = 90 + 30
P = 120 cm