Enigma Mathematica

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Across
  1. 6. A value that does not change.
  2. 8. Two dimensional space taken up by an object or shape,given in square units.
  3. 9. a positive integer with a factor aside from itself and 1.
  4. 11. The numerals 0-9 found in all numbers.
  5. 12. Place holder in place value system.
  6. 13. Study of numbers,shapes and patterns.
  7. 14. Civilisation responsible for discovery of Maths.
Down
  1. 1. A polygon with 4 sides
  2. 2. Numeral system consisting of letters.
  3. 3. Synonym for average.
  4. 4. Ordered pair giving a precise location or position on a coordinate plane.
  5. 5. side of triangle opposite to right angle
  6. 7. Father of Mathematics
  7. 10. lines on a same plane that do not intersect