pdstaw do wzoru:
P= 2ab + 2bc + 2ac
Dane:
a= 6cm
b= 3cm
c= 9cm
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p=2x6x3+2x3x9+2x6x9
2ab= 36cm
2bc= 54cm
2ac= 108 cm
P=36cm+54cm+108cm= 198cm2
P= 2ab + 2bc + 2 ac
P= 2 x 6cm x 3cm + 2 x 3cm x 9 cm + 2 x 6cm x 9cm
P= 12cm x 3 cm + 6 cm x 9cm + 12 cm x 9 cm
P= 36cm² + 54cm² + 108cm²
P=198cm²