# Names of angles formed by lines and a transversal

Lines *a* and *b* are intersected by line *с*.

## Line *с* with respect to lines *a* and *b* is called **a transversal**.

Pairs of angles, which are formed when lines *a *and *b* are cut by transversal* с*, have the following special names:

- Alternate interior angles: 3 and 5, 4 and 6
- Alternate exterior angles: 2 and 7, 1 and 8
- Same-side angles (One-sided angles): 4 and 5, 3 and 6
- Corresponding angles: 1 and 5, 4 and 8, 2 and 6, 3 and 7.