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a-krawędź podst
h-wysokość ściany bocznej
P=Pp+Pb
Pp=a*a
Pp=36
Pb=4(1/2a*h)
Pb=4(3*7,5)
Pb=4*22,5
Pb=90
P=36+90
P=126
b)
l-obwod
h-wys sciany bocznej
a-bok podst
l=4a
32=4a/:4
8=a
Pp=a*a
Pp=64
Pb=4(1/2a*h)
Pb=4(4*9)
Pb=144
P=Pb=Pp
P=144=64
P=208