Let the angle BAC = 300, the angle ACB = 42.
Determine the value of the angle ABC.
The sum of the inner angles of the triangle is 1800, then the angle ABC = (180 – 30 – 42) = 108.
In a triangle opposite the larger side, there is a larger angle.
The angle ABC is the largest, hence the largest side of the AC.
Answer: The largest side of the speaker.
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