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# Warm up - PowerPoint PPT Presentation

Warm up. Identify the Property 1 . AB  CD given CD  AB __________________ 2 . AB = CD given AB + BC = CD + BC __________________ 3 .  B   C and  C   D given  B   D __________________. Plan of reasoning to complete geometric proofs

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Identify the Property

1. AB  CD given

CD  AB __________________

2. AB = CD given

AB + BC = CD + BC __________________

3. B  C and C  D given

B  D __________________

What is given, what can be assumed from the diagram?

What conclusions can be made from each given statement?

What reason can you give to justify each conclusion?

What order can you prove these conclusions?

e) How can you arrive at what you are asked to prove?

2.4 Building a System of Geometry Knowledge

Section 2-4 continued Proofs

Prove: RB  RQ

2.4 Building a System of Geometry Knowledge

Proof

Q

A

R

B

P

2.4 Building a System of Geometry Knowledge

Proof

Given: m5 = m 8 and m6 = m7Prove: mABC = mEFG

6

7

5

8

2.4 Building a System of Geometry Knowledge

2.4 Building a System of Geometry Knowledge

assignment