9514 1404 393
Answer:
41.1
Step-by-step explanation:
A triangle solver can do this nicely. b ≈ 41.1
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You can use the law of cosines for the purpose.
b² = a² +c² -2ac·cos(B)
b² = 120² +110² -2(120)(110)·cos(20°) ≈ 1692.1148
b ≈ √1692.1148 ≈ 41.13532
The missing side is b ≈ 41.1 units.
