lesson 1 3 - alonzo and tracy mourning senior high ...€¦ · 15/08/2019  · lesson 1_3 author:...

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45 Objectives Vocabulary Assignments Use transforma.ons using rules Transforma.on, preimage, image Honors: 1, 3, 5, 10, 1517 Regular: 2, 45, 10, 15

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Page 1: Lesson 1 3 - Alonzo and Tracy Mourning Senior High ...€¦ · 15/08/2019  · Lesson 1_3 Author: Victor Lambert Created Date: 8/25/2019 3:15:49 PM

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Objectives

Vocabulary

Assignments

Use  transforma.ons  using  rules  

Transforma.on,  preimage,  image  

Honors:  1,  3,  5,  10,  15-­‐17  Regular:  2,  4-­‐5,  10,  15  

Page 2: Lesson 1 3 - Alonzo and Tracy Mourning Senior High ...€¦ · 15/08/2019  · Lesson 1_3 Author: Victor Lambert Created Date: 8/25/2019 3:15:49 PM

• A  transforma.on  is  a  func.on  that  changes  the  posi.on,  shape,  and/or  size  od  a  figure  •  The  input  of  a  transforma.on  od  the  preimage,  like  A  •  The  output  is  the  image,  like  A’  (A  prime)  •  Transla.on,  reflec.ons  and  rota.ons  are  three  types  of  transforma.on.  

Basic Transformation Vocabulary

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Page 3: Lesson 1 3 - Alonzo and Tracy Mourning Senior High ...€¦ · 15/08/2019  · Lesson 1_3 Author: Victor Lambert Created Date: 8/25/2019 3:15:49 PM

Explain  1:  Rigid  vs  Nonrigid •  Some  transforma.ons  preserve  length  and  angle  measure,  others  do  not  • A  rigid  mo.on  changed  posi.on  without  affec.ng  size  or  shape  of  the  figure.    •  Examples:  transla.on,  reflec.ons,  and  rota.ons    

Steps:  1)  Look  for  paSers  in  the  coordinates  2)  Compare  lengths  of  the  preimage  and  image  of  corresponding  

segments  3)  Compare  angles  of  corresponding  angles   47  

Page 4: Lesson 1 3 - Alonzo and Tracy Mourning Senior High ...€¦ · 15/08/2019  · Lesson 1_3 Author: Victor Lambert Created Date: 8/25/2019 3:15:49 PM

Types of Transformation

This  Photo  by  Unknown  Author  is  licensed  under  CC  BY-­‐NC-­‐SA  

-­‐Up  -­‐Down  -­‐Le[  -­‐Right  

-­‐90° �-­‐180° -­‐270° -­‐360°  

-­‐Clockwise  -­‐Counter-­‐clockwise  

We  will  discuss  this  later  

Y-­‐axis  X-­‐axis  𝑦=𝑥  𝑦=−𝑥  

 

Decide  if  they  are  Rigid  or  NON-­‐rigid  

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Page 5: Lesson 1 3 - Alonzo and Tracy Mourning Senior High ...€¦ · 15/08/2019  · Lesson 1_3 Author: Victor Lambert Created Date: 8/25/2019 3:15:49 PM

Transforma7on  Example

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Page 6: Lesson 1 3 - Alonzo and Tracy Mourning Senior High ...€¦ · 15/08/2019  · Lesson 1_3 Author: Victor Lambert Created Date: 8/25/2019 3:15:49 PM

Recall  Finding  Distance    Comparing  Distance:  𝐴𝐵→𝐴↑′ 𝐵′  𝐵𝐶→𝐵↑′ 𝐶′  𝐴𝐶→𝐴↑′ 𝐶′    

The  rule  is:  (𝑥,𝑦)→_________  

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Page 7: Lesson 1 3 - Alonzo and Tracy Mourning Senior High ...€¦ · 15/08/2019  · Lesson 1_3 Author: Victor Lambert Created Date: 8/25/2019 3:15:49 PM

Recall  Finding  Distance    

PREIMAGE   IMAGE  Distance  P  to  Q   Distance  P’  to  Q’  

Distance  P  to  R   Distance  P’  to  R’  

Distance  Q  to  R   Distance  Q’  to  R’  

The  rule  is:  (𝑥,𝑦)→_________  

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Page 8: Lesson 1 3 - Alonzo and Tracy Mourning Senior High ...€¦ · 15/08/2019  · Lesson 1_3 Author: Victor Lambert Created Date: 8/25/2019 3:15:49 PM

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Page 9: Lesson 1 3 - Alonzo and Tracy Mourning Senior High ...€¦ · 15/08/2019  · Lesson 1_3 Author: Victor Lambert Created Date: 8/25/2019 3:15:49 PM

Explain  2:  Non  Rigid  Mo7ons •  A  nonrigid  mo.on  do  not  preserve  distance  between  points.      

•  Examples:  stretch,  compression  (dila.ons)  

•  To  Describe  dila.ons  use  this:  •  Ver.cal  Stretch:  Mul.plica.on  on  y.    𝑒𝑥:  (𝑥,𝑦)−>  (𝑥,2𝑦)  

•  Ver.cal  Compression:  Mul.plica.on  on  y.      𝑒𝑥:  (𝑥,𝑦)−>  (𝑥, 1/2 𝑦)  

•  Horizontal  Stretch:  Mul.plica.on  on  x.    𝑒𝑥:  (𝑥,𝑦)−>  (2𝑥,𝑦)  

•  Horizontal  Compression:  Mul.plica.on  on  x.      𝑒𝑥:  (𝑥,𝑦)−>  (1/2 𝑥,𝑦)  

 

Steps:  1)  Look  for  paSerns  in  the  coordinates  (usually  mul.plica.on)  2)  Compare  lengths  of  the  preimage  and  image  of  corresponding  

segments  

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The  y-­‐value  is  being  mul.plied  by  ___  

The  new  rule  is:  (𝑥,𝑦)→_________  

Because  this  CHANGES  sides,  this  is  a  _____________  transforma.on.  

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Page 12: Lesson 1 3 - Alonzo and Tracy Mourning Senior High ...€¦ · 15/08/2019  · Lesson 1_3 Author: Victor Lambert Created Date: 8/25/2019 3:15:49 PM

1.3  Classwork • Honors:  1,  3,  5,  10,  15-­‐17  • Regular:  2,  4-­‐5,  10,    15      Reminders:  q   Summer  Assignment  Due  Friday  q Electronic  Class  Contract  due  Aug  23rd        

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