Jawabanmu

2014-04-21T18:09:56+07:00
T segi3=√15^2-9^2=√225-81=√144=12.... Lp=2LAlas+(kllAlas×t.prisma)....... =2×1/2×18×12+(15+15+18×6)..... =216+(48×6)=216+288=504
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