Hi there!
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I believe your answer is:
88°
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Here’s why:
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- As mentioned in the question, supplementary angles add up to 180°.
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![\boxed{\text{Setting Up An Equation...}}\\\\a + 92 = 180\\----------\\ a - \text{Unknown angle measure.}\\----------\\\rightarrow a + 92 - 92 = 180 - 92\\\\\rightarrow \boxed{ a = 88}](https://img.qammunity.org/2022/formulas/mathematics/college/ay4m12aq3l3mt2fnwky8ngsyqgaf0nmqhs.png)
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The unknown angle measurement should be 88°.
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Hope this helps you. I apologize if it’s incorrect.