⭕ THE MAGIC OF π
PAGE 1 OF 5, MEET THE RATIO OF EVERY CIRCLE
ALWAYS
CIRCUMFERENCE ÷ DIAMETER
For any perfect circle, a coin, a planet's equator, a ripple, the distance around the edge (the circumference) divided by the distance straight across (the diameter) is always the same number. We call that number π, spelled "pi" and written with the Greek letter π. It is a little bigger than 3, about 3.1415926535…, and the digits go on for ever with no final digit and no repeat loop.
🍕 PIZZA = LEARNING PUN
Area of a full circle = πr², where r is the radius (half the diameter). Slicing a pizza from the middle uses the same "π area" idea, the round face is a π-budget we share by angles.
ROUND!
STRING
🧵 Wrap a string around a lid
✂️ Compare to its width
🎯 Same ratio, any size
✂️ Compare to its width
🎯 Same ratio, any size
ROLLS
🎡 Wheels, orbits, clocks
⭕ A circle is one rule
🌍 π is in the background
⭕ A circle is one rule
🌍 π is in the background