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John writes the proof below to show that the sum of the angles in a triangle is equal to 180 G-CO.10

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Answer:

d. When two parallel lines are cut by a transversal, the resulting alternate exterior angles are congruent.

Explanation:

John's proof makes use of the congruence of alternate interior angles. Alternate exterior angles are not referenced by the proof, so their relation to each other is not used.

John writes the proof below to show that the sum of the angles in a triangle is equal-example-1
User Santosh Garole
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