### 9-14

### Parentheses and Pi

Parentheses are very important in spreadsheets because like all programming spreadsheet formulas have to be very specific. A big formula, especially one like Viete’s approximation of pi likely will require us to think both in parentheses and in creating formulas that naturally build a series. This one is quite interesting and you will know if …

### Inverse of a Function

Spreadsheets make it very easy to switch axes and add graphs. They enable students to play with what may have been difficult and abstract concepts like the inverse of a function. You may want to approach the inverse of a function by challenging students to fill in a table of values with a rule that …

### Similar Triangles

Scatterplot graphs enable us to build shapes using spreadsheets. They are surprisingly flexible tools. And since they depend upon a table of value and that table can have both fixed numbers and rules, we can not only build shapes but change them and watch the graph immediately reflect those changes. In this lab we use …