geraldabraham⊕ a: ⇒ Keliling Total = 10 cm + 10 cm + [2 × ¹/₂ Keliling Lingkaran] ⇒ Keliling Total = 20 cm + [Keliling Lingkaran] ⇒ Keliling Total = 20 cm + [π × d] ⇒ Keliling Total = 20 cm + [3,14 × 8] ⇒ Keliling Total = 20 cm + 25,12 cm ⇒ Keliling Total = 45,12 cm
⊕ b: ⇒ Keliling Total = [Keliling ¹/₂ Lingkaran Besar] + [Keliling Lingkaran Kecil] ⇒ Keliling Total = [¹/₂ × π × d₁] + [π × d₂] ⇒ Keliling Total = [¹/₂ × 3,14 × 40] + [3,14 × 20] ⇒ Keliling Total = 62,8 cm + 62,8 cm ⇒ Keliling Total = 125,6 cm
⇒ Keliling Total = 10 cm + 10 cm + [2 × ¹/₂ Keliling Lingkaran]
⇒ Keliling Total = 20 cm + [Keliling Lingkaran]
⇒ Keliling Total = 20 cm + [π × d]
⇒ Keliling Total = 20 cm + [3,14 × 8]
⇒ Keliling Total = 20 cm + 25,12 cm
⇒ Keliling Total = 45,12 cm
⊕ b:
⇒ Keliling Total = [Keliling ¹/₂ Lingkaran Besar] + [Keliling Lingkaran Kecil]
⇒ Keliling Total = [¹/₂ × π × d₁] + [π × d₂]
⇒ Keliling Total = [¹/₂ × 3,14 × 40] + [3,14 × 20]
⇒ Keliling Total = 62,8 cm + 62,8 cm
⇒ Keliling Total = 125,6 cm