Across
- 2. A perfectly round 3D object where π is used in its surface area and volume formulas.
- 5. π is this: the circumference of a circle divided by its diameter.
- 6. A 3D model of Earth, which is a sphere. Math involving its size would need π.
- 7. A circle has 360 of these. Radians are the other way to measure turns, which also involves π.
- 9. A circular object where the numbers represent angles. The hands move in a circle, covering 360 degrees (or 2π radians) in 12 hours.
- 10. The first name of the famous scientist (Einstein) who shares his birthday with Pi Day (March 14th).
Down
- 1. A mathematical rule written in symbols. You use one with π to find the area of a circle.
- 3. The ancient country where the mathematician Archimedes came from. Also, the letter π comes from their alphabet.
- 4. The amount of space inside a 3D shape, like a sphere
- 8. What someone might try to break by memorizing the most digits of pi.