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= 2 x La x Ka x t
= 2 x (12 x 12) + (12 x 4) x 30
= 2 x 144 + 48 x 30
= 288 + 1440
= 1.728 cm²
Jadi, luas permukaan prisma tsb 1.728 cm²
Kalau berkenan, dijadikan solusi terbaik ya ;)
p alas = 12cm
luas permukaan = 2.luas alas.keliling alas.tinggi
luas alas=12.12 = 144cm
keliling alas = 12.4 =48cm
Luas Permukaan = 2.144+48.30 =