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1/4=1/2*1*h
1/4=1/2h /*4
1=2h
h=1/2
a^2=1/4+1/4
a^2=2/4
a=pierwistek z 2 /2
L=2*pierwistek z 2 /2 +1
L=pierwiastek z 2+1
2.
d=5 pierwiastek z 2