Answer :

We can find the angle A using the definition of supplementary angle:

[tex]\begin{gathered} m\angle A+167.3=180 \\ Solve_{\text{ }}for_{\text{ }}m\angle A: \\ m\angle A=180-167.3 \\ m\angle A=12.7 \end{gathered}[/tex]

Answer:

12.7⁰

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