Line d is parallel to line c in the figure below. Parallel lines d and c are intersected by lines q and p to form 2 triangles. At lines d and p, the angle is 2, at d and q, the angle is 1, and at q and p the angle is 3. At lines c and q, the angle is 4, at p and c, the angle is 5, and the third angle is 6.

Which statements about the figure are true? Select three options.

1. Vertical angles prove that Angle 2 is congruent to angle 5.
2. In the two similar triangles, Angle 1 and Angle 4 are alternate interior angles.
3. Vertical angles prove that Angle 3 is congruent to angle 6.
4. The triangles are similar because alternate interior angles are congruent.
5. In the two similar triangles, Angle 2 and Angle 4 are corresponding angles.
6. The triangles are similar because corresponding sides are congruent.