1. Chapter 2 Section 2-1: Conditional Statements
2.01 Use logic and deductive reasoning to draw conclusions, and solve problems.

2. Essential Questions
How do you write a conditional statement in if-then form?
2) How are the converse, inverse, and contrapositive related to the conditional?

3. Homework Answers
P 65: 1) D 2) G 3) B 4) H 5) B 6) I 7) B 8) H 9) 61 ½ in. 10) 756 sq. in. 11) 207 in.
12) 2 ¼ in.
Complete: Check skills, p 68 (all)

4. conditional (statement)
an if-then statement
p is the hypothesis, q is the conclusion
If p, then q.
p implies q.
p only if q.
q if p.

5. converse
a statement in which the hypothesis and conclusion are interchanged.
Conditional: If p, then q.
Converse: If q, then p.

6. inverse If not p, then not q.
(A negation of the conditional statement.)

7. contrapositive
If not q, then not p.

8. truth value
The truth value of a conditional statement is a function of the truth values of its hypothesis and its conclusions.
The only way a conditional can be false is if its hypothesis is true and its conclusion is false.
This fact forms the basis for using a counterexample to disprove a conjecture.

9. Review What is counterexample? What are the 5 Postulates?
What are the 3 basic theorems?

10. Worksheet 2-1
Together: # 1-31, odds & 1-9 odd under p 267
Individually: # 2-32, evens & p. 267 (2 – 8 even)
Practice with Conditionals
With partner do 2 – 22 evens.
Individually: do odds (1 – 23)

11. Different words/ phrases that may be used for if and then
Implies
Only if
Together: Additional Practice with conditional statements worksheet

12. Summarize / Homework Standardized Test Prep: p 74 (64 – 67) Pages 269 – 270 (42 - 45)