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b=10
b^2=a^2+a^2
10^2=2a2
100=2a^2
a^2=100/2
a^2=50
a=pierwiastek z 50
a=pierwiastek z 2*25
a=5pierwiastków z 2
a=h
P=1/2a*h
P=1/2*(5pierwiastków z 2)*(5pierwiastków z 2)
P=1/2*50
P=25 cm^2
^2 znaczy do kwadratu
pozdrawiam:)