[tex]a =alas \: segitiga \\ \sqrt{ {m}^{2} - {t}^{2} } = \sqrt{ {15}^{2} - {12}^{2} } \\ \sqrt{225 - 144} = \sqrt{81} = 9 \\ \\ tinggi \: prisma \\ \frac{Lp - ( a\times t)}{(a + t + m)} \\ \\ \frac{1.188 - (9 \times 12)}{(9 + 12 + 15)} \\ \\ \frac{(1.188 - 108)}{36} \\ \\ \frac{1.080}{36} \\ \\ 30 \: cm \\ \\ Volume \: prisma \\ \frac{1}{2} \times alas \times t \: ∆\times t \: prisma \\ \\ \frac{1}{2} \times 9 \: cm \times 12 \: cm \times 30 \: cm \\ \\ 1.620 \: {cm}^{3} \: (D)[/tex]
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[tex]a =alas \: segitiga \\ \sqrt{ {m}^{2} - {t}^{2} } = \sqrt{ {15}^{2} - {12}^{2} } \\ \sqrt{225 - 144} = \sqrt{81} = 9 \\ \\ tinggi \: prisma \\ \frac{Lp - ( a\times t)}{(a + t + m)} \\ \\ \frac{1.188 - (9 \times 12)}{(9 + 12 + 15)} \\ \\ \frac{(1.188 - 108)}{36} \\ \\ \frac{1.080}{36} \\ \\ 30 \: cm \\ \\ Volume \: prisma \\ \frac{1}{2} \times alas \times t \: ∆\times t \: prisma \\ \\ \frac{1}{2} \times 9 \: cm \times 12 \: cm \times 30 \: cm \\ \\ 1.620 \: {cm}^{3} \: (D)[/tex]