Tolongin plss kakk..besok dikumpulin

1. Luas permukaan

2 x L alas + K alas x t prisma

2 x 1/2 x 3 x 4 + 12 x 15

12 + 180

192cm2

2. Luas = 2 x L alas + K alas x t prisma

512 = 2 x 1/2 x 16 x 12 + 40 x t prisma

512 = 192 + 40 x t prisma

512 – 192 = 40 t prisma

320 = 40 t prisma

t prisma = 320 : 40

t prisma = 8cm