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O raio-radius

How to say "radius" in Brazilian Portuguese?

Meaning of O raio is radius in English. What is the article of raio?

Brazilian Portuguese Translation
O raio
  • O ângulo
  • O círculo
  • O quadrado
  • O retângulo
  • A linha
  • O diâmetro
  • O volume
  • O pentágono
  • A esfera
  • O cone

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