The document discusses geometric concepts such as naming and identifying lines, points, planes, and their intersections. It provides instructions to take colored post-its noting lines can be named with two points or a letter, points can be collinear or noncollinear on a line, planes are named with at least 3 noncollinear points, and the intersection of two planes can be found. It also lists four postulates: two lines intersect at one point; two planes intersect at one line; through any two points there is one line; and through any three noncollinear points there is one plane.

1. August 22, 2013

2. Take one of each of the following colors: pink, orange,
yellow, and green.
Take 4 of the blue post-its.

3. Pink Post-It
Naming a Line Under the Post-It
You can name a
line by any two
points on the line
or with a single
lower case letter.
A
B
t

4. Orange Post - It
Identifying Collinear
Points
Under the Post-It
Points E, F, and C
are collinear on
line m.
Points E, F, and D
are not collinear.
l
m
D
C
n
E
F
P

5. Yellow Post-It
Under the Post-It
Each surface of the box
represents part of a
plane.
You can name a plane
by using at least 3
noncollinear points.
Example: plane AEF
Naming a Plane
A
D
C
B
E
G
F
H

6. Green Post-It
Finding the Intersection
of Two Planes
A
D
C
B
E
G
F
H

7. Blue Post-Its
Postulate 1-1
Through any two points,
there is exactly one
line.
Postulate 1-1
t
A
B
Line t is the ONLY line that passes
through points AB.

8. Blue Post-Its
Postulate 1-2
If two lines intersect,
then they intersect in
exactly ONE point.
Postulate 1-2
D
B
A
E
C

9. Blue Post-Its
Postulate 1-3
If two planes intersect,
then they intersect in
exactly one line.
Postulate 1-3
S
T
R
W

10. Blue Post-Its
Postulate 1-4
Through any three
noncollinear points,
there is exactly ONE
plane.
Postulate 1-4
Through any three noncollinear
points, there is exactly one plane.
A
B C