1. Ch. 3 Vocabulary 1.) parallel lines 2.) perpendicular lines
3.) skew lines
4.) parallel planes

2. 5. ) transversal 6. ) corresponding angles 7
5.) transversal 6.) corresponding angles 7.) alternate interior angles 8.) alternate exterior angles 9.) same side interior angles 10.) perpendicular bisector (3-4)

3. 3.1 Lines & Angles
Geometry

4. Definitions
Parallel lines (ll) – lines that are coplanar & do not intersect
l ll m
Skew lines – lines that are not coplanar & do not intersect.
Perpendicular lines – (┴) intersect at 90°.
Parallel planes – 2 planes that do not intersect.
Example: the floor & the ceiling
l m

5. Line AB & Line DC are ______________.
Line AD & line DE are _______________.
3. Line AB & Line EF are _______________.
4. Line BC & Line AH are _______________.
5. Plane ABC & plane HGF are ____________.
A B
D C
Parallel
Perpendicular
Skew
H G
E F

6. Transversal
A line that intersects 2 or more coplanar lines at different points. t l m

7. Interior ∠s - ___, ___ , ___ , ___ (inside l & m) 2
Interior ∠s - ___, ___ , ___ , ___ (inside l & m)
Exterior ∠s - ___, ___ , ___ , ___ (outside l & m)
Alternate Interior ∠s - ___ & ___ , ___ & ___ (alternate –opposite sides of the transversal)
Alternate Exterior ∠s - ___ & ___ , ___ & ___
Consecutive Interior ∠s - ___ & ___ , ___ & ___ (consecutive – same side of transversal)
Corresponding ∠s - ___ & ___ , ___ & ___ , ___ & ___ ,
___ & ___ (same location)

8. Assignment

9. Postulate 13: ll postulate
If there is a line & a point not on the line, then there is exactly one line through the point ll to the given line.

10. Postulate 14:  Post.
If there is a line & a point not on the line, then there is exactly one line through the point that is  to the given line.