P=(a+b)/2*h
a=7
h=1i1/7a=8/7*7=8
b- druga podstawa
64=(7+b)/2*8
16=7+b
b=9cm
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P=(a+b)/2*h
a=7
h=1i1/7a=8/7*7=8
b- druga podstawa
64=(7+b)/2*8
16=7+b
b=9cm