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9-78.

Solve for . Each part is a separate problem. Homework Help ✎

  1. If and , find .

    Angles 1 and 5 are corresponding angles. Since lines and are parallel, the angles are equal.

  2. If and , find .

    Angles 3 and 6 are alternate interior angles. Since lines and are parallel, the angles are equal.

  3. If and , find .

    Angles 4 and 6 are supplementary because the lines cut by the transversal are parallel.