9. Perhatikan gambar berikut!
B. 65°
penjelasan dengan langkah-langkah:
[tex]\begin{gathered}\small\boxed { \begin {array} {c|c} \sf \red { \: \: \: \: mencari \:nilai \: x \: \: \: \: } \\ \\ \sf 45 + 70 + x = 180° \\ \\ \sf \: 115 + x = 180° \\ \\ \sf \: x = 180 - 115 \\ \\ \sf \: x = 65°\end{array}}\end{gathered}[/tex]
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