Maths crossword

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Across
  1. 2. Zero of a polynomial is also called its
  2. 4. A polynomial of degree one
  3. 6. A line touching circle at one point
  4. 7. Length from centre to circumference
  5. 9. Curved surface area of cylinder = 2πrh is called
  6. 10. Shape having four sides
  7. 12. Distance formula is used in this geometry
  8. 14. Shape with all sides equal but angles not necessarily right
  9. 16. Point where x-axis and y-axis meet
  10. 17. Total surface area of cube depends on this
  11. 18. Graph of linear equation in two variables
  12. 19. Coordinates are written as ordered
Down
  1. 1. A chord through centre of circle
  2. 2. A line joining centre of circle to any point
  3. 3. A polynomial with two terms
  4. 5. A quadrilateral with equal sides and right angles
  5. 6. A quadrilateral with one pair of parallel sides
  6. 8. The longest chord of a circle
  7. 9. Solid with circular bases
  8. 11. Sum of powers of variables in a term
  9. 13. Face edge and vertex are parts of this
  10. 15. highest power of variable in a polynomial