Jawabanmu

2014-04-21T19:02:23+07:00
L = (p.l) + 4(p/2.t)
L= 120 + 4( 60)
L=120+240
L=360 cm²
kira kira gitu~
2014-04-21T20:42:09+07:00
Luas alas = 10 x 10 = 100cm2
t = 12 cm
ta = akar 12 kuadarat + 5 kuadrat = 13
K = 4 x 10 cm = 40cm
L = 1/2 K x ta + La
   = 1/2 40 x 13 + 100cm2
   = 360 cm2