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I need help please , I tried but I just don't know what's the answer ‍♀️

I need help please , I tried but I just don't know what's the answer ‍♀️-example-1
User Liorix
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1 Answer

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As far as I remember, a triangle equals 180 degrees. 31+35=66. 180-66=114. 114/38=3. So b=3.
User Neemzy
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