Jawabanmu

2014-05-19T10:23:24+07:00
Lp = 2(p×l + p×t + l×t)
198 = 2( p × 6 + p × 3 + 6 × 3)
198 = 2(6p + 3p + 18)
198 = 2(9p +18)
198 = 18p + 36
198 - 36 = 18p
     162  = 18p
       p    = 162 : 18
       p    = 9 cm


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2014-05-19T11:08:48+07:00
Lp = 2(p×l + p×t + l×t)
198 = 2( p × 6 + p × 3 + 6 × 3)
198 = 2(6p + 3p + 18)
198 = 2(9p +18)
198 = 18p + 36
198 - 36 = 18p
     162  = 18p
       p    = 162 : 18
       p    = 9 cm