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Pb=x(x+1)/2=(x²+x)/2
Pc=Pp+3Pb
Pc=x²√3/4+3(x²+x)/2
Pp=a²√3/4
Pp=x²√3/4
pb=½ *a *h
Pb=½*x*x+1
Pb=½+2x+1
Pb=2x+½
Pc=x²+√3/4+3*(2x+½)
Pc=x²+√3/4+6x+1½
pc=x+√3/2+6x+1½
Pc=7x√3/2+1½