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De los datos:
α₁ = 60°
α₂ = 45°
r₁ = 9 km
r₂ = 8 km
Arco de circunferencia 1 = L₁
Arco de circunferencia 2 = L₂
Longitud total = L₃ = L₁ + L₂
Utilizar:
L₁ = 2 × π × α₁ × r₁ / 360
L₂ = 2 × π × α₂ × r₂ / 360
L₁ = 2 × 3.1416 × 60 × 9 / 360
L₁ = 3.1416 × 60 × 9 / 180
L₁ = 3.1416 × 9 / 3
L₁ = 3.1416 × 3
L₁ = 9.4248 km
L₁ = 9.42 km
L₂ = 2 × 3.1416 × 45 × 8 / 360
L₂ = 3.1416 × 45 × 8 / 180
L₂ = 3.1416 × 8 / 4
L₂ = 3.1416 × 2
L₂ = 6.2832
L₂ = 6.28 km
L₃ = L₁ + L₂
L₃ = 9.42 + 6.28
L₃ = 15.70 km