Jawabanmu

2014-05-10T15:50:05+07:00
Ef^(2)=de^(2)+df^(2)
ef^(2)=6^(2)+8^2(2)
ef^(2)=36+64
ef^(2)=100
ef=10
LP= 2LA+K.als x t prisma
    = 2x1/2x6x8 + (8+6+10) x 12
    = 48 + 312
    = 316