Jawabanmu

2014-04-27T18:40:34+07:00
Luas permukaan = 198
2. (pl + pt + lt)            = 198 
2. ((9.6) + (9t) + (6t) = 198
2. (54 + 15t)
108 + 15t = 198
15t = 198-108
15t = 90
t = 90/15
t = 6 cm 

#semoga bermanfaat
2014-04-27T18:42:09+07:00
Lp= 198
lp = 2.pl + 2.pt +2.lt
198 = 108 +18t + 12t
198 - 108 = 30 t
90/30 = t
3 = t