1. The document introduces basic geometry concepts including points, lines, line segments, rays, planes, and different types of lines and angles. 2. Students are asked to name and draw examples of these concepts, including parallel lines, intersecting segments, and skew lines. 3. The homework assignment asks students to complete problems drawing and naming examples of points, lines, segments and rays based on these introductory geometry concepts.

1. 9.1 Lines March 26, 2012
Warm Up
Graph the following inequalities
1. a ≥ 3
2. a ≤ 0
Objective: intro to geometry
HW pg. 461 #2­24 even 1

2. 9.1 Lines March 26, 2012
Point A Point A a location in space.
It has no size.
Line AB a series of points that
A BA or n extends in opposite
B
n directions without end.
Plane A B ABCD a flat surface with no
M or M thickness. It contains
D C many lines and extends
without end.
Line segment PQ a part of a line. Has two
or segment Q QP endpoints.
P
Ray CR part of a line.
C R has exactly one endpoint.
name endpoint first.
HW pg. 461 #2­24 even 2

3. 9.1 Lines March 26, 2012
H
n
W T K
1. Name four points 2. Name four different segments
3. Write five other names for WT. 4. Name five different rays.
HW pg. 461 #2­24 even 3

4. 9.1 Lines March 26, 2012
Parallel Lines ||
Q
M
N R
T
V
P S
Skew Lines
HW pg. 461 #2­24 even 4

5. 9.1 Lines March 26, 2012
5. Draw two parallel lines. then draw a segment that intersects the parallel lines.
6. Draw a ray that intersects three parallel lines.
HW pg. 461 #2­24 even 5

6. 9.1 Lines March 26, 2012
Open your books to page 460 Example 2. Study the picture and a, b, and c.
Now let's do Problem 2.
7. Name four segments that intersect EF
8. Name three segments parallel to EF
9. Name four segments skew to EF
HW pg. 461 #2­24 even 6

7. 9.1 Lines March 26, 2012
HW pg. 461 # 2 ­ 24 even
HW pg. 461 #2­24 even 7

8. 9.1 Lines March 26, 2012
Parallel
Skew
Acute angle
Right angle
Obtuse angle
Straight angle
HW pg. 461 #2­24 even 8