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z₁ (¹/₂ , ³/₂) A₁ = 1 * 3 = 3 cm³
Benda tengah = benda 2
z₂ (2 , ¹/₂) A₂ = 2 * 1 = 2 cm²
Benda kanan = Benda 3
z₃ (⁷/₂ , ³/₂) A₃ = 1 * 3 = 3 cm²
Jawaban D