Download 3.1 Parallel Lines and Transversals Vocabulary

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3.1 Parallel Lines and Transversals
Vocabulary:
Parallel Lines: coplanar lines that do not intersect
Skew Lines: lines that do not intersect and are not coplanar
Parallel Planes: planes that do not intersect
Transversal: A line that intersects two or more lines in a plane at different points

How are Skew lines and Parallel lines alike?

How are they different?
a)
b)
c)
d)
Parallel Postulate: If there is a line and a point not on the line, then
Perpendicular Postulate: If there is a line and a point not on the line, then
Angle Pair
Four interior angles lie in the
region between lines and
Four exterior angles lie in the
two regions that are not
between lines and
Consecutive interior angles
are interior angles that lie on
the same side of transversal
Alternate interior angles are
nonadjacent interior angles that
lie on opposite sides of
transversal
Alternate exterior angles are
nonadjacent exterior angles that
lie on opposite sides of
transversal
Corresponding angles lie on
the same side of transversal
and on the same side of lines
and
Corresponding Angles:
Alternate Exterior Angles:
Alternate Interior Angles:
Consecutive Interior Angles:
HOMEWORK: page 176 #13-30
Example
Picture