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Kerangka tutup = 12+12+16 = 40 cm
Rusuk tegak = 3 x 15 = 45 cm
Total = 40+40+45 = 125 cm
keliling alas = 12+12+16 = 40 cm
tinggi prisma = 15 cm
jawab :
panjang kawat = 2(K alas) + 3(tinggiprisma)
= 2(40) + 3(15)
= 80 + 45
= 125 cm