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b(krótsze ramię)=2√2:√3=2√6:3=2/3√6
c(krótsza podstawa)=8-√2-1/3√6
P=[(8-√2-1/3√6+8)*√2]:2=[(16-√2-1/3√3)*√2]:2=(16√2-2-1/3√6):2=8√2-1-1/6√6
Odp. Pole trapezu jest równe 8√2-1-1/6√6 cm².