Răspuns :
latimea = x
lungimea = 3x
(x+3x) x2 = 30
4x=30:2
4x = 15
x= 3,75
latimea = 3,75 cm
lungimea = 11,25 cm
lungimea = 3x
(x+3x) x2 = 30
4x=30:2
4x = 15
x= 3,75
latimea = 3,75 cm
lungimea = 11,25 cm