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How do I solve this question in Geometry ​

How do I solve this question in Geometry ​-example-1

1 Answer

11 votes

Answer:

75°

Explanation:

Δ on left is 60-80-40°

Δ on right is 30-75-75°

the ∡ with the question mark has to be 75° also since it is vertical with the angle opposite it, which is also 75°

User ArcherBird
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