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P = π * diámetro
P = 3,14 * 10 cm
P = 31, 4 cm
Área = π * r²
Área = 3,14 * (5cm)²
Área = 3, 14 * 25 cm²
Área = 78,5 cm²
saludos
p = π * d
p = 3.1416*10
p = 31.416 cm
Area:
a = π * r²
a = 3.1416*5²
a = 3.1416*25
a = 78.54 cm²
Saludos..........