## Opener

Take a look at the back of Part 4, and you’ll see these two questions:

2. What value do you get for P/d if you round the length of the outer side to 2 decimal places? Show a few important steps of this calculation.

3. What value do you get for P/d if you round the length of the outer side to 3 decimal places? Show a few important steps of this calculation.

### Answer these two questions for an *octagon (n=8)* and for a *360-gon (n=360)*.

## 45 Minutes of Work Time

- Goal for today: finish the Big Chart on Excel.
- If you need the file, you can get it here.
- If you’re done, ask for Part 5.

## End of Class: Part 5 Handout

**Part 5: The π Paper**- There is no rubric on this project, instead, you must compete the
.**self-assessment** - The marking period ends on Friday, May 3. You must submit your completed project by then.

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