Algebra!!!!

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Across
  1. 3. the rate at which a repeating event occurs per unit of time
  2. 7. the U shape
  3. 10. the measure of an angle
  4. 11. the space between two intersecting lines
  5. 15. indicates how many times a number, called the base, is multiplied by itself
  6. 18. the difference between consecutive terms is always the same
  7. 20. a point where two lines meet
Down
  1. 1. To solve a problem
  2. 2. a specific order in which things follow each other
  3. 4. - an even function function and is periodic with period 2π
  4. 5. a recurring sequence or arrangement of elements (numbers, shapes, etc.) that follows a specific rule or structure
  5. 6. shows how many times a number contains another
  6. 8. a shape with no edges
  7. 9. - with a ruler we
  8. 12. difference between the lowest and highest values
  9. 13. the perimeter of a circle
  10. 14. the set of all possible x-values
  11. 16. = a/c
  12. 17. an addition of infinitely many terms, one after the other
  13. 19. = a/b