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d₂(2 przekatna)=24,6:3=8,2cm
pole=½d₁d₂=½×24,6×8,2=100,86cm²
P= 1/2*d1*d2
P= 1/2* 24,6*802
P= 1/2* 201,72
P= 100,86
to 1/2 t jedna drua :P
pozdrawiam ;)