Crack the Code: Math Edition

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Across
  1. 3. The distance around a circle
  2. 4. A line segment joining two points on a circle. (6)
  3. 5. The relationship between the sides and angles in a right triangle (10)
  4. 6. A triangle with all sides of different lengths. (8)
  5. 7. The longest side of a right-angled triangle. (10)
  6. 9. The solution to a quadratic equation (4)
  7. 11. The measure of how likely an event is to occur
  8. 13. A polygon with exactly 5 sides (10
  9. 14. The value of a number raised to the power of zero (3)
  10. 16. A method for solving quadratic equations. (8)
Down
  1. 1. The sum of the angles in a triangle. (7)
  2. 2. The theorem stating that if a line divides two sides of a triangle proportionally, then it is parallel to the third side
  3. 8. The point where the x-axis and y-axis intersect on a graph. (5)
  4. 10. The highest power of a polynomial term
  5. 12. A polynomial with two terms. (7)
  6. 15. The ratio of the length of the opposite side to the hypotenuse in a right triangle (6)