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P=a*h
a=6 h=2pierw z 2
P=12pierw z 2
ob=2a+2b
2^2+2pierw2=b^2
4+8=b^2
b=2pierw3
ob=12+4pierw3
Romb
P=pierw10/2
Trapez
P=(a+b)*h/2
a=5 b=5+3=8 h=2pierw3
P=13pierw3
ob=5+8+2pierw3+pierw z 21