Penjelasan dengan langkah-langkah:
LpBR
2 bangun
-Bangun Kubus tanpa tutup
-Limas tanpa alas
Jawab
Lp Kubus tanpa tutup
= 5 × s × s
= 5 × 10 × 10
= 500 cm²
h.selimut Limas
= √(12²+5²)
= √(144+25)
= √169
= 13 cm
Lp selimut Limas
= 4(½ × 10 × 13)
= 4(65)
= 260 cm²
Maka LP gabungan
= 500 + 260
= 760 cm²
[tex]tt = \sqrt{( { \frac{s}{2}) }^{2} + ( {t - s)}^{2} } \\ \sqrt{( { \frac{10}{2}) }^{2} + ( {22 - 10)}^{2} } \\ \sqrt{ {5}^{2} + {12}^{2} } = \sqrt{25 + 144} \\ \sqrt{169} = 13 \\ \\ LP \: kubus + LS \: limas \\ 2 \times s(2,5 \times s + tt) \\ 2 \times 10 (2,5 \times 10 + 13) \\ 20(25 + 13) \\ 20(38) \\ 760 \: {cm}^{2} [/tex]
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Penjelasan dengan langkah-langkah:
LpBR
2 bangun
-Bangun Kubus tanpa tutup
-Limas tanpa alas
Jawab
Lp Kubus tanpa tutup
= 5 × s × s
= 5 × 10 × 10
= 500 cm²
h.selimut Limas
= √(12²+5²)
= √(144+25)
= √169
= 13 cm
Lp selimut Limas
= 4(½ × 10 × 13)
= 4(65)
= 260 cm²
Maka LP gabungan
= 500 + 260
= 760 cm²
[tex]tt = \sqrt{( { \frac{s}{2}) }^{2} + ( {t - s)}^{2} } \\ \sqrt{( { \frac{10}{2}) }^{2} + ( {22 - 10)}^{2} } \\ \sqrt{ {5}^{2} + {12}^{2} } = \sqrt{25 + 144} \\ \sqrt{169} = 13 \\ \\ LP \: kubus + LS \: limas \\ 2 \times s(2,5 \times s + tt) \\ 2 \times 10 (2,5 \times 10 + 13) \\ 20(25 + 13) \\ 20(38) \\ 760 \: {cm}^{2} [/tex]