IV. Reasoning.
9-15. Explain why ∠1 = ∠3 by completing the steps below. Provide a reason for each setup.
[∠1 + ∠2 =_______] [_______________]
[ If two angles are
[∠3 + 2 =________] linear pair, then they
are supplementary]
[∠1 + ∠2 = ∠3 + ___] [_______________]
[Therefore, a = ___] [_______________
9-15. Explain why ∠1 = ∠3 by completing the steps below. Provide a reason for each setup.
[∠1 + ∠2 =_______] [_______________]
[ If two angles are
[∠3 + 2 =________] linear pair, then they
are supplementary]
[∠1 + ∠2 = ∠3 + ___] [_______________]
[Therefore, a = ___] [_______________
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Answer:
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Answer:
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