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Horizontal and parallel lines M Q and U R are intersected by 2 diagonal lines N S and P T to form triangle E G F. Line N S intersects line M Q at point E and intersects line U R at point F. Line P T intersects line M Q at point E and intersects line U R at point G.
Which represents an exterior angle of triangle EGF?

∠MEG
∠NEG
∠PEQ
∠RFS

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Answered by GPT-5 mini
Answer: ∠NEG.

Reason: An exterior angle is formed by extending one side of the triangle. At vertex E, extending EF beyond E gives ray EN, and the angle between EN and EG is ∠NEG, which is the exterior angle of triangle EGF.

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