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YOU HAVE 2 MINUTES TO GET IN THESE GROUPS!

YOU HAVE 2 MINUTES TO GET IN THESE GROUPS!. Group 1 : Tasha, Kenneth, Mari, Sinatu , Teiara Group 2 : Teia , Kecia , Lashany , Erick L, Lafontae , Amina Group 3 : Breniah , Valeria, Conrad, Miguel, Johnny, Group 4: Khamyra , Brishanika , Deandra , Trenita , Karla

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YOU HAVE 2 MINUTES TO GET IN THESE GROUPS!

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  1. YOU HAVE 2 MINUTES TO GET IN THESE GROUPS! Group 1: Tasha, Kenneth, Mari, Sinatu, Teiara Group 2 : Teia, Kecia, Lashany, Erick L, Lafontae, Amina Group 3: Breniah, Valeria, Conrad, Miguel, Johnny, Group 4: Khamyra, Brishanika, Deandra, Trenita, Karla Group 5: Joseph, Tracia, Keoni, James, Nijee Group 6: Mercedes, Sha’Quilla, Jerrica, Brandey, Erik A.

  2. YOU HAVE 2 MINUTES TO GET IN THESE GROUPS Group 1: Kristina, Alyeyah, Barbara, Kaneisha, D’Antoinette Group 2: Selena, Christal, Juwan, Nicole, Brian L Group 3: Julian, Emmanuel, Dalia, Jovanny, Mercedes Group 4: Tiffany, Chelsea, Jasmine R, Tatyana, Gilbert Group 5: Katie, Niesha, Bryan, Raven, Leslie Group 6: Santrell, Yakeemah, Jasmine S, Aaron

  3. Germany: China, Allan, Jasmine T, Vanessa, Desirae, Daniel Mart., Portugal: Cristian H, Ida, Lorena, Stephanie, Sanjae, Manolito France: Scottie, Jasmin C, Cristian E., Juan, Kristy, Nicole Spain: Brittany, LaTyra, Ariana, Jasmine Z, Mohammad, Daniela Italy: Daniel Mej, Yanet, Arely, Angela, Erandi. Poland: Lucia, Lavitchi, Sandy, Coraima, April, Rosendo. YOU HAVE 2 MINUTES TO GET IN THESE GROUPS

  4. 1/6/11 Geometry Bell Ringer YOU HAVE 2 MINUTES TO Identify the congruent triangles and determine the correct reason: Homework: Finish 1/6 Indep. Pract. STUDY FOR QUIZ

  5. 1/6 News and Notes • Test Takers: TODAY AFTER SCHOOL IN ROOM 218! • QUIZ TOMORROW • Perfection Award: 1st and 2nd Period!

  6. 1/6 Agenda • I CAN discover which potential congruency shortcuts are valid and which are invalid reasons for proving triangles congruent. • Bell Ringer • Engage • Explore – AGILE MIND EXPLORATION • Elaborate – INDEPENDENT PRACTICE • Evaluate – QUIZ TOMORROW

  7. Engage • You’re in a group with a computer loaded up to a specific page… WHY?! • What did we say yesterday about the 6 possible shortcuts? • ONLY 4 OF THEM ARE VALID REASONS FOR PROVING TRIANGLES ARE CONGRUENT. 2 OF THEM ARE NOT! • So… What are we going to do today?

  8. Engage • Today we are going to discover which of the 6 DO NOT prove congruence and which DO. • What does prove mean? • To guarantee something is true • There can be NO counterexamples • How are you going to do this? • Think of yourself as a detective. You’re trying to find the two imposters. • Each situation will give you a triangle, and 3 corresponding congruent parts. • Your job is to try to create a triangle from the 3 pieces that is DIFFERENT from the one you’re given.

  9. Choose your job: • 2 Agile Mind Users (you’re in charge of moving the angles and sides, creating triangles on screen) • 2 Innovators (you’re in charge of keeping the ideas flowing with the people running the computer, coming up with new ideas if the group gets stuck) • 1 Note Taker (you’re filling in the chart) • ALL GROUP MEMBERS HAVE INPUT • THIS IS WORTH 10 POINTS BASED SOLELY ON YOUR EFFORT.

  10. Let’s do SSS together

  11. You have the next 15 minutes to work on filling in the chart.

  12. Explain • What did you find? • Let me show you another example of why AAA and SSA do not work!

  13. Equilateral Triangle • This is an equilateral triangle, what is true about its angles? • ALL ANGLES ARE 60° • MARK THIS • Well this is also Equilateral: • So, AAA is NOT a valid shortcut to showing that 2 triangles are congruent BOTH SHOWING AAA

  14. What about SSA? • What shortcut is showing? • SSA • Are these two triangles congruent? • NO • So we found a counterexample, • Therefore “SSA is a pain in the ASS” and can’t prove 2 triangles are congruent.

  15. Independent Practice • This is also in your textbook • Complete Questions #1 – 9 and 12 – 17. • QUIZ TOMORROW: Identify corresponding parts, shortcuts and know which shortcuts work to prove 2 triangles are congruent.

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