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Math 1 February 27 th Turn in homework – page 34

Math 1 February 27 th Turn in homework – page 34. Warm-up: Copy and complete the following To use the SSS postulate to show ∆ABC ∆EFG, the following must be true: Turn in warm-ups today. Make sure each day is separated from the next. Proving Triangles Congruent.

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Math 1 February 27 th Turn in homework – page 34

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  1. Math 1February 27thTurn in homework – page 34 • Warm-up: Copy and complete the following To use the SSS postulate to show ∆ABC ∆EFG, the following must be true: Turn in warm-ups today. Make sure each day is separated from the next.

  2. Proving Triangles Congruent Powerpoint hosted on www.worldofteaching.com Please visit for 100’s more free powerpoints

  3. F B A C E D Congruent Triangles Two TRIANGLES with exactly the same size and shape.

  4. Side-Side-Side (SSS) E B F A D C • AB DE • BC EF • AC DF ABC DEF

  5. Side-Angle-Side (SAS) B E F A C D • AB DE • A D • AC DF ABC DEF included angle

  6. Angle-Side-Angle (ASA) B E F A C D • A D • AB  DE • B E ABC DEF Included side

  7. Included Side The side between two angles GI GH HI

  8. E Y S Included Side Name the included angle: Y and E E and S S and Y YE ES SY

  9. Angle-Angle-Side (AAS) B E F A C D • A D • B E • BC  EF ABC DEF Non-included side

  10. Warning: No SSA Postulate There is no such thing as an SSA postulate! E B F A C D NOT CONGRUENT

  11. Warning: No AAA Postulate There is no such thing as an AAA postulate! E B A C F D NOT CONGRUENT

  12. SSS correspondence • ASA correspondence • SAS correspondence • AAS correspondence • SSA correspondence • AAA correspondence The Congruence Postulates

  13. Name That Postulate (when possible) 2. 1. SAS ASA 3. 4. SSA SSS

  14. Name That Postulate (when possible) 5. 6. AAA ASA 7. 8. SSA SAS

  15. Name That Postulate (when possible) 10. 9. Vertical Angles Reflexive Property SAS SAS 11. 12. Reflexive Property Vertical Angles SSA SAS

  16. HW: Name That Postulate (when possible) 13. 14. 15. 16.

  17. HW: Name That Postulate (when possible) 17. 18. 19.

  18. Let’s Practice ACFE Indicate the additional information needed to enable us to apply the specified congruence postulate. For ASA: B D For SAS: AF For AAS:

  19. HW Indicate the additional information needed to enable us to apply the specified congruence postulate. 20. For ASA: 21. For SAS: 22. For AAS:

  20. HOMEWORK • COMPLETE PAGE 35(ALL)

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