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PROOF Given: ∠1 and ∠2 form linear pair ; ∠2 and ∠3 are supplementary Prove: ∠1≅∠3
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I need to write a 2-column proof; statements on left and reasons on right I just need a reason to prove that ∠1≅∠3. Will it be because of definition of congruent angles or angles supplementary to the same ∠ or ≅ angles are ≅. Which one is the best answer?
what are the angle measures?
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