Maths all over the words

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