Answer:
∠4 = 64°
Step-by-step explanation:
If ∠3 and ∠4 are congruent, it means that both angles sum up to 180°
Given that, ∠3 = 116°
=> ∠3 + ∠4 = 180°
=> 116° + ∠4 = 180°
=> ∠4 = (180 - 116)°
=> ∠4 = 64°
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