Odpowiedzi

2010-02-10T08:50:30+01:00
Dane:
d₁ = 18cm
d₂ = 22cm
obliczmy u - bok rombu

u : x = d₁ : a
v :(a - x) = d₂ : a
dzielimy stronami
u(a - x) : (vx) = d₁: d₂

z warunku u = v bo romb
(a-x) : x = 9 : 11
a - x = 9 : 11x
a = 20 : 11x --> x = 11 : 20a
ua = d₁x --> ua = d₁ × 11 : 20a
u = 11: 20d₁
u = 11 : 20 × 18 = 9,9cm
u = 9,9 cm
bok rombu to 9,9cm