Respuesta :

helperjoe
maybe 156? that's the answer I came up with.
irspow
area of bottom=4*12=48

area of back side=3*12=36

area of front side=5*12=60

area of each of the triangle sides=4*3/2=6  so the total area is:

A=48+36+60+6+6=156cm^2

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