the answer to this question is A
Answer:
A
Explanation:
First, we know that angles 6 and 8 are supplementary.
Therefore m∠6 + m∠8 = 180°
123.5° + m∠8 = 180°
m∠8 = 56.5°
Then, using the alternating exterior angle theorem, we can find that...
m∠8 ≅ m∠1
So m∠1 = 56.5°
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