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2.5 Proofs in geometry

2.5 Proofs in geometry. Agenda. Turn in Projects !!! Quiz Warm-up HW Check 2.5 Notes Practice Homework. Warm-up. Homework Check. 5. Reflexive 6. Distributive 7. Division 8. Symmetric 9. Multiplication 10. Reflex. 11. Subtract. 12. Symmetric

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2.5 Proofs in geometry

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  1. 2.5 Proofs in geometry

  2. Agenda Turn in Projects!!! Quiz Warm-up HW Check 2.5 Notes Practice Homework

  3. Warm-up

  4. Homework Check 5. Reflexive 6. Distributive 7. Division 8. Symmetric 9. Multiplication 10. Reflex. 11. Subtract. 12. Symmetric 13. Substit. 14. Addition 15. Transitive 16. 15 17. 5x 18. YU=AB 19. <K 20.<PQR 21. 3 22. EF +7 27. Given, Defn of Midpt., Substitution, Subtraction, Division

  5. Vertical Angles 2 1 3 4 2 1 3 4 • A pair of nonadjacent angles formed by two intersecting lines. • What can we say about vertical angles? • Vertical Angles are≅ • Indicate which angles are congruent

  6. Are angles whose measures have a sum of

  7. D C Are two angles whose measures have a sum of

  8. Example: If m<1 = 3x+5 and m<3 = 5x -25, Find m<4 and m<GHD

  9. Reasoning and Proof In Geometry **Things we CANNOT assume unless it is marked or stated.

  10. Draw a conclusion based on the info given. -Justify Given: m<A = 90 Conclusion: Reason:

  11. Conclusion: Reason:

  12. 3. Given: R is the midpoint of ST. Conclusion: Reason: Given: W, U, and V are collinear and U is between W and V. Conclusion: Reason:

  13. Homework Worksheet Mini-Project due Tuesday, Sept 18 Test Sept 18.

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