Volume prisma segitiga disamping adalah...

[tex]v \: prisma \: = l.alas \times t.prisma \\ v \: prisma \: = \frac{1}{2} \times a \times t \times t.prisma \\ v \: prisma \: = \frac{1}{2} \times 18 \: \times \sqrt{18 \times 11} \times 25