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1/11 Geometry Bell Ringer

1/11 Geometry Bell Ringer. Grab today’s materials Choose #1-3 from last night’s HW to review. Given: Prove:. Homework: Finish 3 Proofs!. 1/11 News and Notes. Extra Credit? Homework Checked? Perfection Award: 4 th Period. I still need to talk to Oscar, Shacora and DeAndra. Tomorrow.

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1/11 Geometry Bell Ringer

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  1. 1/11 Geometry Bell Ringer Grab today’s materials Choose #1-3 from last night’s HW to review. Given: Prove: Homework: Finish 3 Proofs!

  2. 1/11 News and Notes • Extra Credit? • Homework Checked? • Perfection Award: 4th Period. I still need to talk to Oscar, Shacora and DeAndra

  3. Tomorrow • I will be out of town for a meeting. • You will have a sub and a worksheet. • That worksheet is worth 10 points. • Do not let your name appear on the sub’s note to me. • It is expected that you turn in the worksheet on Thursday!

  4. 1/11 Agenda • I CAN prove two triangles are congruent when given information requires geometric interpretation. • 1. Bell Ringer • 2. New Material – Quick Review/ One Example. • 3. Guided Practice – One on your own with guided questions. • 4. Independent Practice

  5. How’d it go yesterday? • Step 1: Mark/Use Given Information • Step 2: Use properties, theorems, postulates that you know to get 2 triangles to show a shortcut postulate. • Step 3: Make statement that 2 triangles are congruent by SSS, SAS, ASA or SAA • Today? Just more work in Step 2 – 2a and 2b

  6. Step 2 Broken Down • 2a – Take what’s given and translate it into new statements. • 2b – Use other geometry properties, theorems and postulates to show a shortcut.

  7. Example 1 • Given: O is the midpoint of • Prove:

  8. Example 2 P S A • Given: • Prove: Q R P S Q R Q R

  9. Guided Practice – Try with a partner • Given: XZ is the angle bisector of angle WXY • Prove: Given Given Def. of Angle Bisector Reflexive Prop. SAS

  10. Independent Practice • You now have the rest of class to practice the three proofs on the back of your page.

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