# Lesson goal: Coaxing pi from the computer

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This is a simple lesson, to see what formula you can tell the computer, tha when evaluated, will give $\pi (=3.1415..)$. The easiest one we can think of is $\pi=4\tan^{-1}(1)$. What other formulas can you think of?

# Now you try. What formula can you think of (or find, figure out, etc.) that will give $\pi$ when evaluated?

Show a friend, family member, or teacher what you've done!

1. Use [Control]-[C] (Windows) or [⌘]-[C] (MacOS) to copy your code.

2. Paste it using [Control]-[V] (Windows) or [⌘]-[V] (MacOS) into this page

3. Then click the "Use on iPhone" button that you'll see.