PARALLEL LINES AND TRANSVERSALS In the picture below, Lines X and Y are
lines, and Line Tis a
or a line that intersects them. Use a protractor to measure each of the 8 angles that were formed.
Line T
Line X
ZA/B
2D/LC
Line Y
ZELF
26/2H
• What do you notice about the angle measures? List which angles have the same measure.
.
Label the inside of the parallel lines above "Interior", and label the outside region of the parallel
lines "Exterior".
Several special pairs of angles are created when parallel lines are cut by a transversal. Use the
picture above and the table to help you define and describe these types of angle pairs.
ANGLE PAIR
DEFINITION
EXAMPLES RELATIONSHIP
VERTICAL Pairs of
angles formed by
ANGLES
lines,
STRAIGHT
ANGLES
Angles that form a straight line and add up to
(Also called
ALTERNATE Angles
the parallel lines and on
INTERIOR ANGLES opposite sides of the
ALTERNATE
EXTERIOR ANGLES
Angles
the parallel lines and on
opposite sides of the
CORRESPONDING
ANGLES
Angles in the same relative position; angles in
Maneuvering the Middle LLC, 2016