Numbers and operations

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Across
  1. 3. a decimal that repeats without end
  2. 5. a graph is proportional if it is straight and goes through the __________
  3. 9. a number sentence with no equal sign
  4. 10. angles that add up to 180 degrees
  5. 12. angles that add up to 90 degrees
  6. 17. a line that goes across a circle through the center
  7. 18. a positive number goes this way on a number line
  8. 19. a triangle that has two equal sides
  9. 20. a red triangle with a 90 degree angle
Down
  1. 1. a number sentence with a more than or less than sign
  2. 2. an event that has a 100% chance of happening
  3. 4. a letter or symbol that stands for a number
  4. 6. a table shows a relationship when all y/x are the same
  5. 7. an event that will probably happen
  6. 8. a rate for one of something
  7. 11. to expand an expression you use this property
  8. 13. a negative number goes this way on a number line
  9. 14. a line that goes from the center to the side of a circle
  10. 15. a decimal that ends
  11. 16. a sample that has this is not fair or representative of the population