Respuesta :

tramserran

angle b (b): = (1/2)c

complement (c): c

  b    + c  = 90°

(1/2)c + c = 90

    (3/2)c = 90

        3c = 180

         c = 60

angle b (b): = (1/2)c  = (1/2)(60)  = 30

Answer: angle b=30°

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