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P=16×16
P=256cm²
Ob.=a+a+b
b trzeba obliczyć z twierdzenia Pitagorasa
16²+16²=b²
256+256=b²
512=b²/√
b=√512
b=√64×8
b=8√8
Ob.=a+a+b
Ob.=16+16+8√8
Ob.=32+8√8 8√8=23
Ob.=32+23
Ob.=55cm