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raio, rádio radi Radius, Speiche radius erradio radius, rayon radio radio
raio raig Strahl ray erradio     rayo, semirrecta
raio, rádio radi   radius erradio radius, rayon   radio
      ray erradio      
raio, rádio radi Speiche radius, spoke, wheel_spoke erradio radius, rayon, rayons   radio, rayo
raio, rádio radi   r, radius erradio radius, rayon raio r, radio