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semoga membantumaaf kalau salah
K=54 cm
p=2l
Dit L?
K=2(p+l)
54=2(p+l)
p+l=27 ........ Sunstitusi p=2l
2l+l=27
3l=27
I=9 cm........lebarnya
p=2l=2(9)=18 cm ......panjangnya
Luasnya:
L=p.l=9.18=162 cm²