09:52:10	 From  Prof Alexandre Mendes : http://www.inmetro.gov.br/legislacao/rtac/pdf/RTAC002595.pdf
09:54:25	 From  Prof Alexandre Mendes : 12:1
09:54:39	 From  Prof Alexandre Mendes : distancia/raio
09:55:02	 From  Prof Alexandre Mendes : distancia/diametro
09:55:23	 From  Prof Alexandre Mendes : R = 3 cm
09:55:43	 From  Prof Alexandre Mendes : D = R x campo de visão
09:55:52	 From  Prof Alexandre Mendes : D = 3 x 12 = 36 cm
09:56:17	 From  Prof Alexandre Mendes : D = diâmetro x campo de visão
09:56:29	 From  Prof Alexandre Mendes : D = 3 x 12 = 36 cm
10:42:44	 From  Prof Alexandre Mendes : 50/10
10:42:49	 From  Prof Alexandre Mendes : 5 cm