# Parallel Lines and Transversal

### Notes:

A line which intersects two or more lines at distinct points is called a transversal. Line m1 intersects lines l1 and l2 at points P and Q respectively. Therefore, line m1 is a
transversal for lines l1 and l2.

Observe that four angles are formed at each of the points P and Q.

Different angles are:

Exterior angles

Interior angles

Corresponding angles

Alternate Interior Angles

Alternate Exterior Angles

Interior Angles on same side