wyznacz ze wzoru a
P= 2ab + 2ah + 2bh
2ab+2ah+2bh=P /:2
ab+ah+bh=P/2
a(b+h+bh)=P/2
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P= 2ab + 2ah + 2bh
2ab+2ah+2bh=P /:2
ab+ah+bh=P/2
a(b+h+bh)=P/2