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GBK Geometry

GBK Geometry. Jordan Johnson. Today’s plan. Greeting Polyomino Blowups: Wrap-up & Puzzle Work Scale and Area Homework / Questions Clean-up. Wrap-up Questions. What’s the relationship between the scale factor and the ratio of perimeters?

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GBK Geometry

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  1. GBK Geometry Jordan Johnson

  2. Today’s plan • Greeting • Polyomino Blowups: Wrap-up & Puzzle Work • Scale and Area • Homework / Questions • Clean-up

  3. Wrap-up Questions • What’s the relationship between the scale factor and the ratio of perimeters? • What’s the relationship between the scale factor and the ratio of areas? • Why is 2’s answer different from 1’s?

  4. Further Exercises • With the interlocking cubes, make tiles in the shape of the “l” and “i” tetrominoes. • On the centimeter grid paper, draw the five doubled tetrominoes (i.e., doubled in both dimensions). • Use your tiles to cover each of the doubled figures; record your solution. • Bonus: • Repeat this problem with these shapes, being sure to multiply the length in both dimensions: • Tripled tetrominoes, using the “l” and “i” tiles • Tripled pentominoes, using the “P” and “L” tiles

  5. Open Puzzle Each digit is replaced by “X” American Mathematical Monthly, April 1954. Contributed by P.L. Chessin.

  6. Homework • Journal #23 – hand it in before leaving today. • With the cubes, make “l” and “i” tetrominoes. • On the centimeter grid paper, draw the five doubled tetrominoes (i.e., doubled in both dimensions). • Use your tiles to cover each of the doubled figures; record your solution. • Asg #69: From Chapter 10, Lesson 6, do: • Set I Exercises 1-24. • Set II Exercises 32-36 and 44-51. • Bonus: Set III. • Due Tuesday, 4/30. • Test is Wednesday, 5/1. • Asg #70: Ch. 10 Algebra Review Part I (p. 425): • Exercises 1-10 – due Thursday, 5/2.

  7. Clean-up / Reminders • Pick up all trash / items. • Push in chairs (at front and back tables). • See you tomorrow!

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