Question

1. a) consecutive interior b) alternate exterior c) alternate interior d) corresponding 16) a) corresponding b) adjacent c) alternate interior d) alternate exterior 17) a) corresponding b) vertical c) alternate exterior d) alternate interior 18) a) consecutive interior b) corresponding c) alternate interior d) alternate exterior

Explanation:

1. For question 15: Alternate interior angles are non - adjacent angles between two parallel lines and on opposite sides of a transversal. Here, the angles x and y fit this definition.
2. For question 16: Corresponding angles are in the same relative position with respect to the parallel lines and the transversal. The angles x and y are corresponding angles.
3. For question 17: Alternate interior angles are located between the two parallel lines and on opposite sides of the transversal. The angles x and y are alternate interior angles.
4. For question 18: Consecutive interior angles are between the two parallel lines and on the same side of the transversal. The angles x and y are consecutive interior angles.

Answer:

1. C. alternate interior
2. A. corresponding
3. D. alternate interior
4. A. consecutive interior