TolongDijawabNo5YangAtas YangPakekJalanDiKsihJawabanTerbaik:)

perbandingan Trigonometri pada sudut istimewa
[tex] \frac{nk}{nl} = \sin( \alpha ) \\ \frac{nk}{8} = \sin(30) \\ \frac{nk}{8} = \frac{1}{2} \\ nk \times 2= 8 \times 1 \\ 2nk = 8 \\ nk = 4[/tex]
rumus phytagoras
[tex]b = \sqrt{ {c}^{2} - {a}^{2} } \\ b = \sqrt{ {8}^{2} - {4}^{2} } \\ b = \sqrt{64 - 16} \\ b = \sqrt{48 } \\ b = 4 \sqrt{3} [/tex]
[tex]luas = p \times l = 4 \times 4 \sqrt{3 } = 16 \sqrt{3} [/tex]