Copy of Parallel Lines & Related Angles
Recall that a transversal is a line that intersects 2 other lines at 2 distinct points.
In the applet below, the dashed brown line is a transversal that intersects 2 parallel lines.
Take a few minutes to explore the special relationships among the various types of angle pair formed when a transversal intersects PARALLEL LINES.
As you do, be sure to drag the green points around to change the red and/or blue angle measures that appear.
Use your observations to correctly fill in each blank below:
1. When a transversal intersects PARALLEL LINES, all pairs of corresponding angles are________________________.
2. When a transversal intersects PARALLEL LINES, all pairs of alternate interior angles are ______________________.
3. When a transversal intersects PARALLEL LINES, all pairs of alternate exterior angles are ______________________.
4. When a transversal intersects PARALLEL LINES, all pairs of same-side interior angles are ______________________.
5. When a transversal intersects PARALLEL LINES, all pairs of same-side exterior angles are ______________________.