Ф=180-100=80
70+80+2α+2β=360
2α+2β=210
α+β=105
Entonces: x+α+β=180=x+105 ⇒x=75°
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Ф=180-100=80
70+80+2α+2β=360
2α+2β=210
α+β=105
Entonces: x+α+β=180=x+105 ⇒x=75°