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WELCOME!!!!

WELCOME!!!!. Get out your Homework from 2.2 Write down your homework for tonight S&S Unit 2 ACE 5-13 Get out a BOOK and DEAR!!!  Warm Up Green Book Pg 91 #’s 51-59. WARM UP: Pg 91 #’s 51-59. 51) 3 52) -8 53) -12 54) 0 55)-16 56) 4 57) -12 58) 20 59) D.

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WELCOME!!!!

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  1. WELCOME!!!! Get out your Homework from 2.2 Write down your homework for tonight S&S Unit 2 ACE 5-13 Get out a BOOK and DEAR!!!  Warm Up Green Book Pg 91 #’s 51-59

  2. WARM UP: Pg 91 #’s 51-59 51) 3 52) -8 53) -12 54) 0 55)-16 56) 4 57) -12 58) 20 59) D

  3. #. Date Brief Description 1. 10-3 S&S Problem 2.1 day 1/ ACE (1 a-e) 10-4 S&S Problem 2.1 day 2/ ACE (14-15) 10-5 S&S Problem 2.2 ACE 3, 16, 17 10-6 S&S Problem 2.3 ACE 5,6 BIG IDEA: Scale Factors You need: Calculator 2.3 Handout Page 25

  4. Lets Reflect on Problem 2.2 1) How does Zug’s hat compare with the Mug’s hat? The side lengths of Zug’s hat are double or two times the length of Mug’s hat. 2) How many Mug hats can you put in Zug’s Hat? 4 3) How do the perimeters compare between Mug and Bug? Mug to Glug? Mug to Lug? Only Mug to Bug the side lengths and perimeter tripled 4) The hats of the set figure are all made from a triangle and a rectangle, but they are not similar. How can you tell if two triangles or rectangles are similar? Corresponding angles are congruent and the side lengths are changed by the same scale factor.

  5. A Scale Factor SF = 3 Scale Factor SF = 1/2

  6. What is the Scale Factor of Figure A to Figure B? 1) 2) SF = 1/4 4 cm A B 16 cm 3 cm 12 cm SF = 5 5 cm A 25 cm 7 cm B 35 cm

  7. Which Rectangles are Similar? ALL of the rectangles are similar!!! ANSWER 10 cm C 15 cm 18 cm A B 33 cm 12 cm 22 cm D E 26 cm 12 cm 18 cm 39 cm

  8. Both are correct. Scale factor from L to J is 2. Scale factor from J to L is 1/2 or 0.5.

  9. Rectangles J, M, and N are Similar Figures.

  10. C. Which triangles are similar? Scale Factor? Triangles O, R, S are all similar figures.

  11. 1. Yes. Scale factor times original perimeter will equal the other perimeter. 2. Yes. Scale factor times Scale Factor times original area will equal the other area.

  12. Answers will Vary !!! 4x16,SF=2, 5x20, SF=5/2 1 x 3 right triangle Any square.

  13. Divide the length in the second figure by the corresponding length in the first figure. A B 12.5 5 2 5 12.5 ÷ 5 =2.5 5 ÷ 2 = 2.5 SF = 2.5

  14. Make sure your Notebook assignment sheet looks like this!!! #. Date Brief Description 1. 10-3 S&S Problem 2.1 day 1/ ACE (1 a-e) 10-4 S&S Problem 2.1 day 2/ ACE (14-15) 10-5 S&S Problem 2.2 ACE 3, 16, 17 10-6 S&S Problem 2.3 ACE 5,6

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