⁄ 350 70 = 2 ⁄ 350 = 2 × 70 ⁄ 350 = 140 = 2,5 (terbukti) Jika = 140 , = 350 , ∶ ⁄ 2 2 × 350 ⁄ = 2 2 ⁄ 350 140 = ⁄ 350 = 140 = 2,5 (terbukti) Jika = 210 , = 350 , ∶ ⁄ 3 ⁄ 3 × 350 = 3 2 ⁄ 1050 210 = 2 1050 ⁄ = 2 × 210 1050 ⁄ = 420 = 2,5 (terbukti) 44