# 9/10

9/10 WARM UP

Statement:

People who go to Starbucks like coffee

Write the statement ’ s …

Conditional:

Converse:

Inverse:

Contrapositive:

• State the truth value for each

Announcements

• Quiz Friday

Biconditional Statement

• Occur when both a conditional and its converse are true

• Are created by joining the two parts of each conditional with if and only if

## • IFF=if and only if

Can they be a biconditional???

• If it rains then it is wet

• If you are short then you are not tall

• If you are a senior then you are in high school

### Writing a Biconditional

• If 60 minutes has gone by then it has been an hour:

• Step 1: Is the conditional statement true?

• Step 2. Write the converse

• Step 3: Is the converse true?

• Step 4: If both are TRUE write biconditional

ROUND ROBIN

Pull out WS: Bi-conditionals and

Definitions

CFA

• Complete the 5 multiple choice questions on your own

Question

1

A B

The student does not recognize consider the false conclusion when reading the hypothesis.

The student tries to make a prediction beyond the given information.

C

D

The student incorrectly adds information outside the original statement.

2

The student incorrectly chooses this option because student cannot recognize the connection between biconditional statement, true conditional, and true converse.

The student does not know the key terms of biconditional statement as “if and only if”

The student does not know the key terms of biconditional statement as “if and only if”

3

Student does not understand how to determine or identify valid statements.

Student does not understand how to determine or identify valid statements

Student does not understand how to determine valid statements.

4

Student does not understand how to determine the validity of a conditional statement

Student does not understand how to determine the validity of the inverse of a statement.

Student does not understand how to determine the validity of the inverse of a statement.

5

Student does not understand how to determine converse of a conditional statement

Student does not understand how to determine a valid converse of a conditional statement

Student does not understand how to determine a valid converse of a conditional statement