A **transversal line** is a line that intersects two or more other lines at distinct points. The lines that are intersected by the transversal can be parallel, but they don't have to be. When a transversal crosses parallel lines, it forms several pairs of angles with interesting relationships, such as corresponding angles, alternate interior angles, and alternate exterior angles.

### Important angle types formed by a transversal:
1. **Corresponding angles**: Angles that are in the same relative position at each intersection.
2. **Alternate interior angles**: Angles that are on opposite sides of the transversal but inside the two intersected lines.
3. **Alternate exterior angles**: Angles on opposite sides of the transversal but outside the two intersected lines.
4. **Consecutive interior angles (or same-side interior angles)**: Angles on the same side of the transversal and inside the two intersected lines.

### Example:
If two parallel lines are cut by a transversal, corresponding angles will be congruent, and alternate interior/exterior angles will also be congruent.

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Here are 5 related questions to explore:
1. What are corresponding angles, and why are they congruent when lines are parallel?
2. What is the relationship between alternate interior angles in parallel lines?
3. How can you prove that two lines are parallel using a transversal?
4. What is the sum of consecutive interior angles when a transversal intersects parallel lines?
5. How do you calculate the angles formed by a transversal in non-parallel lines?

**Tip**: When solving problems involving transversals, focus on identifying angle pairs (corresponding, alternate interior/exterior, etc.) to simplify the calculations.

Explore what a transversal line is and how it interacts with other lines to form angle relationships. Learn about corresponding angles, alternate interior and exterior angles, and consecutive interior angles with clear explanations and examples. Ideal for students in Grades 6-8 studying geometry.

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