Math Crossword Puzzle

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Across
  1. 1. a rule defining the relationship between x and y
  2. 7. a statement of the equality of two expression
  3. 8. the other option
  4. 9. What do you do when you make an object bigger?
  5. 10. a line that passes through two lines
  6. 12. a statement that is accepted without proof
  7. 14. same shape and size
  8. 16. how steep a line
  9. 20. three or more points are ____ if they lie on the same line
Down
  1. 2. the trig. the function of adjacent/hypotenuse
  2. 3. longest side of a right-angled triangle
  3. 4. the trig function of opposite/hypotenuse
  4. 5. value when it is squared gives the number
  5. 6. example: used for finding out the hypotenuse of a triangle
  6. 11. What is a description used for two shapes with equal angles?
  7. 13. the trig. the function of opposite/adjacent
  8. 15. to make an object smaller
  9. 17. a number that can be made by dividing two numbers
  10. 18. a real number that cannot be written as a simple fraction
  11. 19. the upwards angle from the horizontal line to point of interest.