1. Is Ming correct to say that they have built half of a 20 20 square when they already have a 10 10 square? Use your formulas and the patterns you found in your table and graphs to explain your thinking.
  2. What fraction of a 20 20 square is built when Michael and Ming have a 10 10 square done? Show how you know.
  3. After building a 19 19 square, Michael wants to add red tiles to make it a 20 20 square.
    1. How many red tiles will he need to add? Show how you know.
    2. How many total tiles will be in the square?
    3. Use the fact that 19 19 = 361 to find the total number of tiles in a different way.
  4. Use your table, graphs, and formulas to answer the following questions.
    1. Which is greater for a 5 5 square, the new growth in squares (G) or the size in squares (S)?
    2. Would your answer to Question 11A be the same for a turtle of any age? Explain how you know.
    3. Which gets larger more quickly, the new growth in squares (G) or the size in squares (S)? How can you tell?
    4. In what ways are the graphs from Questions 2A and 2B similar?
    5. In what ways are the graphs from Questions 2A and 2B different?