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dit: luas
dij: k=2p+2l
k=2(2l)+2l
k=4l+2l=6l
54=6l
l= 54:6
l= 9 cm
maka, panjangnya 2(9)=18cm
jadi, luas= panjang*lebar=18*9=162 cm kuadrat
*be the best answer:)