The angle 3 and angle 5 lie on same side of tranversal line and with in the parallel lines. So such pair of angles are called same side interior angles.
[tex]\angle3\text{ and }\angle5\text{ = Same side interior angles.}[/tex]
The angle 2 lie with in parallel line and angle 6 lie outside of parallel line with both angles on same side of transversal line. Such pair of angles are called corresponding angles.
[tex]\angle2\text{ and }\angle6\text{ = Corresponding angles}[/tex]
The angle 3 and angle 4 lies with in the parallel lines and opposite side of transversal line. So such pair of angles called alternate interior angles.
[tex]\angle3\text{ and }\angle4\text{ = Alternate interior angles}[/tex]
The angle 1 and angle 7 lie outside of parallel line with opposite side of transversal line. Such pair of angles called alternate exterior angles.
[tex]\angle1\text{ and }\angle7\text{ = alternate exterior angles}[/tex]
