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L= longitud del circulo
π = 3.14159
r = radio = diametro/2
1. Circulo de 15 cm diametro - solamente la mitad del perimetro
2 x 3.14159 x (15/2)
2
L1 = 23.56 cm
2. Circulo de 14.5 cm radio - solamente un carto del perimetro
2 x 3.14159 x 14.5
4
L2 = 22.77 cm
3. Circulo de 7.5 cm diametro - todo el perimetro
2 x 3.14159 x (7.5/2)
L3 = 23.56 cm
L = L1 + L2 + L3
L = 69.89 cm