va 𝐿𝐶 chiziqlar bo‘ylab kesilib, ikkita uchburchak va to‘rtburchak (2-rasm) hosil qilindi (rasmga qarang). Agar 𝐾𝐶𝐷 uchburchak yuzi 15 cm2, 𝐵𝐶𝐿 uchburchak yuzi 14 cm2, 𝐴𝐿𝐶𝐾 to‘rtburchak yuzi 41 cm2, 𝐴𝐾=8 cm, 𝐴𝐿=9 cm bo‘lsa, 𝐴𝐵𝐶𝐷 parallelogramm perimetrini toping.