You don’t just get π in circular motion. You get π in any oscillation. When a mass bobs on a spring, or a pendulum swings ...
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Circle the date! Today is Pi Day for 2026!

This day only comes 'round' once every year!
Leeron is a New York-based writer who specializes in covering technology for small and mid-sized businesses. Her work has been featured in publications including Bankrate, Quartz, the Village Voice, ...