Question

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Corresponding angles are supplementary.

Vertical angles are supplementary.

Vertical angles are congruent.

Corresponding angles are congruent.

Answer 1

Vertical angles are congruent.

Explanation:

Angles 1 & 4 are vertical angles. They are created using only two lines that cross(intersect). Line a and the unmarked, kind of diagonal line (its the transversal) intersect to create four angles. Two of them are marked Angle1 and Angle4; they are vertical angles. They are congruent.