Math

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Across
  1. 2. figure corresponding to that
  2. 5. famous Indian mathematician
  3. 6. plane thing
  4. 9. number system
  5. 10. 67-37
Down
  1. 1. polygon with 4 sides
  2. 3. queen of sciences
  3. 4. study of topological properties
  4. 7. if a letter gone I will.be even
  5. 8. life of pi