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Sveta_85 [38]
3 years ago
6

Because they are alternate interior angles.

Mathematics
1 answer:
ycow [4]3 years ago
3 0
Because they are corresponding. That means that they sit in the exact same place within their own group of angles. That means, however, that lines a and b have to parallel. It's not marked that they are, but I'm assuming they must be by the answer choices you provided.
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we know that

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