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P=1/2*a*h=1/2*8*21=84
wysokocs ae:84=1/2*17*h
h=9 15/17
wysokocs bf:84=1/2*10*h
h=16 4/5
P=1/2*a*h=1/2*8*21=84
wysokocs ae:
84=1/2*17*h
h=9 15/17
wysokocs bf:
84=1/2*10*h
h=16 4/5