TERRA

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Across
  1. 1. a collection or list of items
  2. 2. A point where the graph intersects an axis.
  3. 4. father of mathematics
  4. 7. the number 1.618 is also called as
  5. 8. The country which developed sudoku
  6. 9. roman numeral 'L' stands for
Down
  1. 1. if 4th December 2015 was a Friday, 4th December 2016 will be a
  2. 3. a one termed polynomial
  3. 5. a polygon with three sides
  4. 6. India's first satellite was named after