wyznacz b ze wzoru P=(a+b)*h/2ma wyjść b=2P/h-a
2P=(a+b)h
2P/h=a+b
b=2P/h-a
P=(a+b)*h/2
P=ah/2+bh/2 /*2
2P=ah+bh /:h
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2P=(a+b)h
2P/h=a+b
b=2P/h-a
P=(a+b)*h/2
P=ah/2+bh/2 /*2
2P=ah+bh /:h
2P/h=a+b
b=2P/h-a