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2-27-13 Changing Dimensions and Scale

2-27-13 Changing Dimensions and Scale. EQ: How can the scale on a map help estimate an actual distance? How can we use a map to estimate area to understand statistics given in the news. BOP. DWP.

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2-27-13 Changing Dimensions and Scale

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  1. 2-27-13 Changing Dimensions and Scale EQ: How can the scale on a map help estimate an actual distance? How can we use a map to estimate area to understand statistics given in the news BOP DWP Sally has a recipe that needs ¾ teaspoon of butter for every 2 cups of milk. If Sally increases the amount of milk to 3 cups of milk, how many teaspoons of butter are needed?

  2. About 17% Sally has a recipe that needs ¾ teaspoon of butter for every 2 cups of milk. If Sally increases the amount of milk to 3 cups of milk, how many teaspoons of butter are needed?

  3. Check Homework handout Word problems with fractions.

  4. FORMULAS To KNOW!

  5. Formulas for area and perimeter. Fold a sheet of paper into thirds. Label: Shape, Perimeter, Area

  6. Draw and label each shape and write the formulas. See the example below. Side Side Use s for the length of each side when writing formulas.

  7. width length Use w for width and l for length when writing formulas.

  8. d height a c base Use a, b, c and d for the length of the sides.

  9. a c height b Use a, b and c for the length of the sides and h for height.

  10. base 2 c height base 1 Use a, b1, c , and b2 for the length of the sides.

  11. Diameter Use D for the diameter when writing the formulas.

  12. Draw and label each shape and write the formulas. See the example below. Side Side Use s for the length of each side when writing formulas.

  13. width length Use w for width and l for length when writing formulas.

  14. d height a c base Use a, b, c and d for the length of the sides.

  15. a c height b Use a, b and c for the length of the sides and h for height.

  16. base 2 c height base 1 Use a, b1, c , and b2 for the length of the sides.

  17. Diameter Use D for the diameter when writing the formulas.

  18. Yesterday we talked about changing dimensions. What do you remember?

  19. Draw a picture to help solve. 12 cm 2 24 cm2

  20. 6 48 cm2

  21. 12

  22. 6 24 2

  23. π42=3.14(16) =

  24. Scale Drawings http://www.youtube.com/watch?v=qB8iQX-5Gc8 You will need to draw pictures when prompted in the video.

  25. EXIT TICKET 3 things I learned from today are … 2 questions I still have are … 1 way I see things differently from today Homework: Handout

  26. 2-28-13 Scale and Project Information EQ: What is scale factor? How do you know if an object is enlarged or reduced? BOP DWP

  27. Check homework - Handout on Scale

  28. ADD VOCABULARY WORDS TO YOUR FLIP FOLDER

  29. Scale factor = 1/2 Make a table to organize your work. When the scale factor is greater than one then the object is increased in size.

  30. When the scale factor is less than one, then the resulting image is decreased in size.

  31. Scale Factor = 3

  32. Complete the table.

  33. EXIT TICKET 3 things I learned from today are … 2 questions I still have are … 1 way I see things differently from today Homework: Handout

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