Maths crossword

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Across
  1. 4. The value k where P(k)=0. (4 letters) — Intersects 3-Across at letter 6 (N)
  2. 6. Geometric figures with the same shape but different sizes. (7 letters) — Intersects 1-Across at letter 1 (Q)
  3. 8. The longest side in a right triangle. (10 letters) — Intersects 2-Across at letter 3 (C)
  4. 10. Trigonometric ratio of opposite side to hypotenuse. (4 letters) — Intersects 4-Across at letter 4 (G) and 5-Across at letter 3 (N)
  5. 11. The line touching a circle at exactly one point. (7 letters)
Down
  1. 1. Clues
  2. 2. The point (0,0) where the axes intersect. (6 letters)
  3. 3. A polynomial of degree two. (9 letters)
  4. 5. A graphical curve of cumulative frequency. (5 letters) — Intersects 1-Across at letter 6 (A)
  5. 7. The middle value of a sorted data set. (6 letters)
  6. 9. A straight line that intersects a circle at two distinct points. (6 letters)