Jawaban:
t.prisma = 20cm
sisi miring ∆ = 17 cm dan tinggi ∆ = 8 cm
alas ∆ = ?
[tex]a = \sqrt{s{}^{2} -t {}^{2} } = \sqrt{17 {}^{2} - {8}^{2} } = \sqrt{289 - 64} = \sqrt{225} = 15 \: cm[/tex]
[tex]LPP = (2.luas \: alas \: segitiga) +keliling \: segitiga \: \times tinggi \: prisma \\ [/tex]
[tex]LPP = (2. \frac{1}{2} .alas.tinggi) + (8 + 15 + 17) \times 20 \\ LPP = (15 \times 8) + (40 \times 20) \\ LPP = 120 + 800 \\ LPP = 920 \: cm {}^{2} [/tex]
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Jawaban:
t.prisma = 20cm
sisi miring ∆ = 17 cm dan tinggi ∆ = 8 cm
alas ∆ = ?
[tex]a = \sqrt{s{}^{2} -t {}^{2} } = \sqrt{17 {}^{2} - {8}^{2} } = \sqrt{289 - 64} = \sqrt{225} = 15 \: cm[/tex]
[tex]LPP = (2.luas \: alas \: segitiga) +keliling \: segitiga \: \times tinggi \: prisma \\ [/tex]
[tex]LPP = (2. \frac{1}{2} .alas.tinggi) + (8 + 15 + 17) \times 20 \\ LPP = (15 \times 8) + (40 \times 20) \\ LPP = 120 + 800 \\ LPP = 920 \: cm {}^{2} [/tex]