1. GBK G EOMETRY Jordan Johnson

2. T ODAY S PLAN Greeting Polyomino Blowups: Wrap-up & Puzzle Work Scale and Area Homework / Questions Clean-up

3. W RAP - UP Q UESTIONS 1. Whats the relationship between the scale factor and the ratio of perimeters? 2. Whats the relationship between the scale factor and the ratio of areas? 3. Why is 2s answer different from 1s?

4. F URTHER E XERCISES 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. O PEN P UZZLE XX8XX XXXXXXXXXXX XXX XXXX XXX XXXX XXXX American Mathematical Monthly, April 1954. Contributed by P.L. Chessin. Each digit is replaced by X

6. H OMEWORK 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. C LEAN - UP / R EMINDERS Pick up all trash / items. Push in chairs (at front and back tables). See you tomorrow!