Respuesta :

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1)


n=side number


a=exterior angle



n.a=360


n.30=360



n=12


2)




3x+10+x+148+117+90=450


4x=85


x=21.25


3)


n.a=360


30.a=360


a=12 exterior angle


180-12=168 interior angle





Answer:

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