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2 answers:
We are given:
GH = 60
HI = 42
∠H = 123°
We can use the law of cosines to solve:
GI² = HI² + GH² - 2 * HI * GH * cos ∠H
GI² = 42² + 60² - 2 * 60 * 42 * cos ∠123
GI² = 1,764 + 3,600 - 2 * 60 * 42 * -0.545
GI² = 8,110.8
√GI² = √8,110.8
GI ≈ 90.06
Therefore, the length of GI is approzimately 90.06 units.
Best of Luck!
Answer:
The length of GI is 90 units.
Step-by-step explanation:
You have to use Cosine Rule,

Let a = GI units = x units,
Let b = 60 units,
Let c = 42 units,
Let A = 123°,




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