Răspuns:
Explicație:
P = 2*(L + l)
L + l = P : 2 = 98 : 2 = 49 m
l = 3L/4
L + 3L/4 = 49
4L/4 + 3L/4 = 49
7L/4 = 49
L = 49 : 7/4 = 49*4/7 = 28 m are lungimea
l = 28*3/4 = 21 m are latimea
(sau l = 49 - L = 49 - 28 = 21 m)
A = L*l = 28*21 = 588 m²
P patrat = 2*98 = 196 m
L patrat = P patrat : 4 = 196 : 4 = 49 m
A patrat = 49² = 2401 m²