TRIVIA TIME!

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