fun with maths

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Across
  1. 3. who is known as human computer.
  2. 7. this is found by arya bhatta
  3. 8. number the number which can be written in the form p/q.
  4. 9. opposite of odd
  5. 10. radius x 2
  6. 12. it is used to find the hypotenuse of a right angle triangle.
  7. 15. the first natural number .
  8. 16. a word with 5 letters related to mathematics.
  9. 17. shape sizes and theories.
  10. 19. the other word of perimeter of circle.
  11. 22. who found area of circle.
Down
  1. 1. result of division .
  2. 2. who found division lemma.
  3. 3. 'An equation has no meaning for me unless it expresses a thought of God' Who said these words .
  4. 4. this has base as 10.
  5. 5. where 2 lines cross over.
  6. 6. a 3 sided polygon (a flat shape with straight sides.
  7. 11. the longest side of a triangle.
  8. 12. Sum of all sides
  9. 13. a shape with 8 sides
  10. 14. repeated addition.
  11. 18. closed figure having no edges.
  12. 20. perimeter of circle is measured by
  13. 21. πr2h is the volume of