Question

how are ∠3 and ∠6 related?
corresponding angles
alternate interior angles
alternate exterior angles
consecutive (same - side) interior angles
consecutive (same - side) exterior angles

Explanation:

Corresponding angles are in the same relative position at each intersection where a straight - line crosses two others. Alternate interior angles are between the two lines and on opposite sides of the transversal. Alternate exterior angles are outside the two lines and on opposite sides of the transversal. Consecutive (same - side) interior angles are between the two lines and on the same side of the transversal. Consecutive (same - side) exterior angles are outside the two lines and on the same side of the transversal. ∠3 and ∠6 are on opposite sides of the transversal and between the two parallel lines, which is the definition of alternate interior angles.

Answer:

Alternate Interior Angles