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Warm up

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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Warm up

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  1. 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 __________________

  2. Plan of reasoning to complete geometric proofs 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

  3. 5. Given: PQ bisects AB at point R and AR  RQ Prove: RB  RQ 2.4 Building a System of Geometry Knowledge Proof Q A R B P

  4. Statements Reasons 2.4 Building a System of Geometry Knowledge Proof

  5. 2.4 Building a System of Geometry Knowledge Given: m5 = m 8 and m6 = m7Prove: mABC = mEFG 6 7 5 8

  6. Statements Reasons 2.4 Building a System of Geometry Knowledge

  7. Intro to Proof Worksheet 2.4 Building a System of Geometry Knowledge assignment

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