Day 1 ­ Chapter 2.1 Conditional Statements.notebook
September 29, 2014
2.1 Conditional Statements
Objective: Recognize conditional statements
Write the converses of conditional statements.
G.1.A.
Performance Standard 1.8, 3.5, 4.1
Knowledge MA2, MA4
DOK 1,2
1
Day 1 ­ Chapter 2.1 Conditional Statements.notebook
September 29, 2014
A conditional statement is an if­then statement.
Example: If you are not completely satisfied, then your money will be
returned to you.
Every conditional statement has 2 parts:
­ the hypothesis is the part the follows "if"
­ the conclusion is the part that follows "then"
2
Day 1 ­ Chapter 2.1 Conditional Statements.notebook
September 29, 2014
Example: Identify the hypothesis by underlining it once and the conclusion by underlining it twice.
a) If you clean my house, then I will pay you $50.
b) If y­3=5, then y=8.
c) If x+20 = 32, then x = 12.
d) "If my fans think that I can do everything I say I can do, then
they're crazier than I am." ­Muhammed Ali
3
Day 1 ­ Chapter 2.1 Conditional Statements.notebook
September 29, 2014
Example: Write each sentence as a conditional statement.
a) Two skew lines do not lie in the same plane.
b) Through any two points there is exactly one line.
c) Points on the same line are collinear.
d) A rectangle has four right angles.
e) Whole numbers that have 2 as a factor are even.
4
Day 1 ­ Chapter 2.1 Conditional Statements.notebook
September 29, 2014
Conditional statements may be true or false. If a statement is TRUE it has to be true 100% of the time­­NO EXCEPTIONS! If they are false, you must find a counterexample.
a) If you live in a country that borders China, then you live in India.
b) If 2x ­ 6 = 10, then x = 2.
c) If it is a weekday, then it is Monday.
5
Day 1 ­ Chapter 2.1 Conditional Statements.notebook
September 29, 2014
6