tolong jawab pakai cara

Kelas 6 Matematika
Bab Luas dan Volume

1] Luas alas = 40
p x l = 40
p x 5 = 40
p = 40/5
p = 8 cm

Luas permukaan
= 2 x (p x l + p x t + l x t)
= 2 x (8 x 5 + 8 x 12 + 5 x 12)
= 2 x (40 + 96 + 60)
= 2 x 196
= 392 cm²

2] Luas permukaan prisma
= (2 x 1/2 x a x t) + ((a + t + m) x tinggi prisma)
= (12 x 9) + ((12 + 9 + 15) x 30)
= 108 + (36 x 30)
= 108 + 1.080
= 1.188 cm²