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Pp=a^2
49=a^2
a=7
h=10
P=1/2*a*h
P=1/2*10*7=5*7=35cm^2
Pb=4*35=140cm^2
Pc=Pp+Pb
Pc=49+140=189cm^2
Pole=7²+4*7*1/2*10=49+140=189