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Geometry Fri 10/23/14. Warm-ups – please gather the following: Scissors and a glue stick Word bank and blank T-Charts (from yesterday) Complete example proof from yesterday Section 2.7 Angle Relationships Cut and Paste Proofs Team Activity Homework: A#2.7 page 103 #2-9, 12-20.
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Geometry Fri 10/23/14 • Warm-ups – please gather the following: • Scissors and a glue stick • Word bank and blank T-Charts (from yesterday) • Complete example proof from yesterday • Section 2.7 Angle Relationships • Cut and Paste Proofs Team Activity • Homework: A#2.7 page 103 #2-9, 12-20
After this section, you will be able to: Success Criteria: • Identify and use as reasons in proofs Postulate 2.9 (Segment Addition Postulate) and Theorem 2.2 (Reflexive, Symmetric, Transitive Properties) • Organize Statements and Reasons in the correct order for a Segment Proof • Q&A • Guided Practice • Cut and Paste Proofs • Homework
Writing Proofs about Segment Congruence If , then Given: Prove:
2-7 Proving Segment Relationships • Recall from Chapter 1 (pg. 15) What is the definition of Congruence? ________________________________ • Transitive Property: If _______ and _______, then _______ If _______ and _______, then _______
2-7 Proving Segment Relationships • Segment Addition Postulate _________________________________ _________________________________ _________________________________
Writing Proofs about Segment Congruence Given: PQ = RS Prove: PR = QS