Odpowiedź :
[tex]Zadanie\\\\d_{1}=4\ dm=40\ cm\\d_{2}=14\ cm\\\\P=\frac{d_{1} \cdot d_{2}}{2}\\\\ P=\frac{40\cdot 14}{2}=20\cdot14=280\ cm^{2}[/tex]
[tex]Zadanie\\\\d_{1}=4\ dm=40\ cm\\d_{2}=14\ cm\\\\P=\frac{d_{1} \cdot d_{2}}{2}\\\\ P=\frac{40\cdot 14}{2}=20\cdot14=280\ cm^{2}[/tex]