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"π" for Regular Polygons?

Henri Picciotto

This page accompanies Lab 11.8 in Geometry Labs.

You might precede Lab 11.8 with a reminder of the formulas for circumference and area of a circle, with the help of this animation.

You can use these slides (more animation!) before, during, or after the Lab:
html with narration (does not work on Safari)
html without narration
Spoiler alert: the slides answer questions 1-3 of the Lab.

Here is a colored and expanded version of the figure in the Lab: