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P pole pow. szescianu
20%P pole pow. zakladek
a dlugosc krawedzi szescianu
P+20%P=1620
P+0,2P=1620
1,2P=1620/:1,2
P=1620/1,2
P=1350
P=6a²
6a²=1350/:6
a²=225
a=15[cm]
Dlugosc krawedzi szescianu wynosi 15[cm]
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zad5)
a)Tak b)Tak c)Nie d)Tak