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d1=16cm
H=2a
a=?
Pc=2Pp+Pb
Pp=d*d1/2
2Pp=d*d1
Pb=4aH
a²=(1/2 d)²+(1/2 d1)²
a²=6²+8²=36+64=100
a=√100
a=10cm
H=2*10=20cm
Pc=12*16+4*10*20 =192+800
Pc=992 cm²
Wysokość = 2*x=20 cm