Maths all over the words

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Across
  1. 1. the region bounded by the shape of an object
  2. 4. The set of all output values of a function
  3. 5. the amount of space in a certain 3D object
  4. 9. A symbol for a value we don't know yet
  5. 11. ratio of the side adjacent to an acute angle (in a right-angled triangle) to the hypotenuse.
  6. 13. transformation that changes each point of the figure with degrees
  7. 14. a number that is divisible only by itself and 1
  8. 15. an expression that defines a relationship between two variables
  9. 17. a plane figure with six straight sides and angles.
  10. 18. ratio of the side opposite a given angle (in a right-angled triangle) to the hypotenuse.
  11. 19. part of the line that connects two points
  12. 20. a round plane figure whose boundary consists of points equidistant from a fixed point
  13. 21. if it has equal sides and angles
  14. 22. all the input values shown on the x-axis
  15. 24. science of collecting and analyzing numerical data in large quantities
Down
  1. 2. equality between two expressions consisting of variables and/or numbers
  2. 3. a numerical quantity that is not a whole number
  3. 5. A point where two or more line segments meet
  4. 6. 2, 4, 6, 8
  5. 7. transformation that changes the size of the figure.
  6. 8. measure of the edge of a figure
  7. 10. two equal sides and one different
  8. 12. 1, 3, 5, 7, 9
  9. 16. the angle in degrees measured clockwise from north
  10. 23. a region which is formed by two rays or lines that shares a common endpoint