Brainly

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Across
  1. 5. π
  2. 7. restrict or confine
  3. 11. Having exact same size and shape
  4. 14. Line that cross each other at exactly one point
  5. 15. a+(b+c)=(a+b)+c
Down
  1. 1. 4th degree polynomial
  2. 2. The following of one thing after another
  3. 3. Angle whose measure is 180°
  4. 4. A proposition obtained by conversion
  5. 6. the act or breaking up numbers
  6. 8. termed as one to one
  7. 9. statistical class figure
  8. 10. An exact location in space
  9. 12. way of measuring the length of a vector
  10. 13. Edges meeting point