1. Proving Statements about Segments
BIG IDEA: Reasoning and Proof
ESSENTIAL UNDERSTANDING
Given information, definitions, properties, postulates, and previously proven theorems can be used as reasons in a proof.
MATHEMATICAL PRACTICE
Construct viable arguments and critique the reasoning of others.

2. Definition: a ____________________ of the meaning of a word or phrase.
Theorem: a ____________________ that is proven
Postulate (or Axiom): an ____________________ statement of fact
Theorems

3. EX 1 Given: Prove: Statements Reasons 1. 1. Given 2. 3.
3. Addition Property 4. 5.
5. Substitution Property 6.
EX 1

4. EX 2 Given: Prove: Statements Reasons 1. 2. Transitive Property 3. 4.5.
EX 2

5. Given:
Prove:
Statements
Reasons 1.
1. Given 2. 3.
3. Given 4.
EX 3

6. EX 4 Given: Find: Statements Reasons 1. 1. Given 2.
2. Segment Addition Postulate 3. 4. 5.
5. Combine like terms 6. 7.
7. Division Property
EX 4

7. 2.5 p , 10, 16 – 18 all, 21, 22 – 34 evens, 37 – 40 all
17 questions