Across
- 2. What is the only number that has letters in alphabetical order?
- 5. What is an angle called if it’s greater than 90 degrees?
- 7. What is the term used for the perimeter of a circle?
- 8. Who invented the use of negative numbers?
- 9. Which number is considered a “magic number?”
- 10. What is the name of the longest side of a right-angled triangle?
Down
- 1. What comes after a trillion?
- 3. When is Pi Day celebrated?
- 4. How many times can a sheet of paper be folded in half?
- 6. What does the Roman numeral “X” equal?