Answer:
○ [tex]\displaystyle 54°[/tex]
Step-by-step explanation:
Use the Triangular Interior Angles Theorem to figure this out:
180° = [3x]° + [2x]° + [5x]°
[tex]\displaystyle \frac{180°}{10°} = \frac{[10x]°}{10°} \\ \\ 18 = x[/tex]
Plug this back into the m∠L to get 54°.
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