1. Bell Ringer I will not answer questions about the Bell Ringer. You will be getting a new seating arrangement so keep your stuff together and ready to move. Solve each proportion. You must show your work to receive credit.

2. Announcements STI Assessment is this Wednesday, Feb 25 ◦Bring something to do when you finish Quiz on Thursday, Feb 26 ◦Sections:  6.1 - Ratios  6.2 – Unit Rate  6.4 – Proportional and Nonproportional  6.5 – Solving Proportions  6.6 – Scale Drawing and Models

3. INVESTIGATION Dear Detective, Someone has robbed the National Bank of Illuminations in Washington D.C. It is your job to use the clues left by the perpetrators to locate and apprehend the robber. Your tools will be your power of deduction and your mathematical knowledge. Good luck cracking this case!

4. Clues Clue 1: The perpetrator is 15 cm tall in the security camera image Clue 2: 32 pounds of quarters were stolen Clue 3: The getaway car was a silver 1989 HN Cosine which travels 8 miles per gallon of gas.

5. Section 6.6 – Scale Drawings and Models R drive > Key > Feb 23_27 > 2_23__6.6 Scale Drawings and Models File > Save As > P drive > Math > Feb 23_27 > 2_23__6.6 Scale Drawings and Models

6. Video Clip Introduction https://www.youtube.com/watch?v=NQ- 8IuUkJJc https://www.youtube.com/watch?v=NQ- 8IuUkJJc Note to Self: start at 52 sec

7. Vocabulary Scale Drawing/Scale Model – Used to represent an object that is too large or too small to be drawn or built at actual size Scale – Determined by the ratio of a given length on the drawing or model to its corresponding length on the actual object.

8. Notes The lengths and widths of objects on a scale drawing or model are proportional to the lengths and widths of the actual object Examples of Scales: ◦1 in = 3 ft 1 inch represents an actual distance of 3 feet ◦1 cm = 2mm 1 cm represents an actual distance of 2 mm Scales are written so that a unit length on the model is listed first.

9. Example 1 Determine the Scale

10. Example 2 Determine the Scale

11. Example 3 – Your Turn Determine the Scale A model car is 4 inches long. The actual car is 12 feet long. What is the scale of the model?

12. Example 4 – Your Turn Determine the Scale Joanna knows the distance to her grandmother’s house is 21 miles. On a map, the distance is 5.25 inches. What is the scale of the map?

13. Class Work

14. Homework When you turn in your class work, pick up your homework and begin working quietly on these problems.