parallel lines

perpendicular lines

skew lines

coincident lines

transversal

coincident line

segment

skew line

$\angle1\ and\ \angle8$

$\angle3\ and\ \angle7$

$\angle4\ and\ \angle6$

$\angle1\ and\ \angle4$

consecutive interior angles

corresponding angles

alternate interior angles

alternate exterior angles

$\angle2\ and\ \angle7$

$\angle3\ and\ \angle5$

$\angle2\ and\ \angle3$

$\angle8\ and\ \angle6$

Line CG

Line BD

Line CD

Line BF

$\angle3\ and\ \angle7$

$\angle4\ and\ \angle8$

$\angle2\ and\ \angle5$

$\angle2\ and\ \angle6$

0

1

2

infinite

$\angle4\ and\ \angle5$

$\angle3\ and\ \angle5$

$\angle1\ and\ \angle8$

$\angle3\ and\ \angle6$

Lines AC and BC

Lines AB and AC

Lines AB and CD

Lines BC and CD

Lines AB and CD

Lines AC and BC

Lines BC and CD

Lines AB and BC

Corresponding 

Consecutive Interior

Alternate Interior

Vertical

$\angle6\ and\ \angle7$

$\angle9\ and\ \angle12$

$\angle7\ and\ \angle11$

$\angle5\ and\ \angle9$