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P = 18*6 = 108 cm²
Ob. = 18*2 + 6*2 = 48 cm
b) 6+3 = 9
P = 9*6 = 54 cm²
Ob. = 9*2 + 6*2 = 30 cm
2bok-6x3=18cm
P=6cmx18cm=108cm2
b)1bok-6cm
2bok-6cm+3cm=9cm
P=6cmx9cm=54cm2