Mathomania

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Across
  1. 6. the spiral shape of sunflower follows this
  2. 8. one-hundredth of a second
  3. 10. The most stable geometric shape
Down
  1. 1. The only number that can't be represented in Roman Numerals
  2. 2. The numbers on opposite side of a dice always add up to this
  3. 3. The number known as the golden ratio
  4. 4. The Symbol for division is called so
  5. 5. If you write pi to two decimal places and read it backwards
  6. 6. A never ending pattern
  7. 7. Father of Geometry
  8. 9. The only number with letters in alphabetical order