Jawabanmu

2014-05-24T20:30:46+07:00
2 ( 2l + l ) = 54 cm 6 l = 54 cm Lebar = 9 cm Panjangnya = 18 cm Luas = pxl 9x18 = 162 cm2
1 4 1
2014-05-24T20:59:55+07:00
Kll = 2p + 2l
54 = 2(2l) + 2l
54 = 4l + 2l
54 = 6l
l = 54 : 6 = 9

p = 2l
  = 2 x 9 = 18
Luas = p x l
       = 18 x 9 = 162 cm