volume prisma tersebut adalah ... cm3

1. cari tinggi trapesium yg bl diketahui
[tex] = \sqrt{ {5}^{2} - { \frac{(12 - 6)}{2} }^{2} } \\ = \sqrt{25 - {3}^{2} } \\ = \sqrt{16} \\ = 4[/tex]
2. Vprisma = Lalas x tinggi prisma
[tex] = ( \frac{1}{2} \times (12 + 6) \times 4) \times 15 \\ = ( \frac{1}{2} \times 18\times 4) \times 15 \\ = 36 \times 15 \\ = 540[/tex]