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360/45=8
Odp.Liczba boków wielokąta wynosi 8.
x - miara kąta wewnętrznego
n - liczba boków
x=(n-2)*180/n => x=(180n-360)/n => x=180-360/n => 360/n=180-x => 360/(180-x)=n
n=360/(180-135)=360/45=8