Math 444 Geometry for Teachers Fall 2006
Assignment #6 (Due Monday, 11/6/06)
Midterm Exam: Monday, November 6, in class.
Reading: Nothing new this week. Reread all the reading assignments so far.
Reading Report: None this week.
Written Problems: These do not have to be handed in – they are only for your practice. All are
from Venema.
•Venema, pp. 50–51, Exercises 4.1, 4.4, 4.5, 4.11, 4.12.
•Which statements are true for all sets Aand B?
1. A⊆A.
2. A⊆(A∩B).
3. A⊆(A∪B).
4. (B−A)⊆A.
5. (B−A)⊆B.
6. ∅∈A.
7. ∅⊆A.
8. A∪B=B=⇒A⊆B.