## Defining Pi Project, Part 3: Developing Generalizations (10 minutes)

- By now, you should have completed at least three constructions.
- Sit with your partner, and take out Part 3.
- It’s ok if you don’t know the
**“right”**answers yet – put your best thinking on the page. - You have 10 minutes to complete Part 3.

## Defining Pi Project, Part 4: The Big Chart (5 minutes)

- Step 1: Take 5 minutes to transfer your values from Part 2 to the table in Part 4.
- In 5 minutes, we will start another example.

## Example: 360 Slices (15 minutes)

- Can we fill out a row in our analysis chart for 360 slices without actually constructing a 360-gon?

## Continuing on The Big Chart (10 minutes)

- Try to fill in the missing values for our 360-gon.
- Think about how you could fill in two more rows of this chart.
- If you’re not done with Part 3, finish it now.
**Does Part 4 help you with Part 3?** - Answer the questions on the back of the page.

## Using Excel as a Tool

- How can we use our discussion from the 360-gon example to help us create algebraic expressions that a computer can use to perform the calculations for us?

## Closing: Record Sheets

- Write a sentence or two about what you did today.
- What does it mean to be precise?
- What questions do you currently have about this project?

## Problem Set #10 is due tomorrow.

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