The mysterious number Pi shows up all over mathematics. But where does it come from, and how could we calculate it from scratch? In this circle we’ll travel back in time and tackle the mystery the way ancient mathematicians did, using only geometry. We’ll build and analyze triangles inside a circle, explore the Pythagorean Theorem from the ground up (no prior knowledge needed!), and use these tools to get closer and closer to Pi. Along the way we'll be able to connect our work to real‑world questions like estimating the distance the Earth travels around the Sun.

Note - Circle Prerequisite: Comfort with square roots