Algebra extra credit

123456789101112131415161718192021
Across
  1. 3. a shape with four sides
  2. 8. the graph is not a line
  3. 10. a three dimentional triangle
  4. 12. adding something to something else
  5. 13. a tool used to measure liquids
  6. 15. another form of measurementbut larger than centimeters
  7. 16. a tool used to measure objects
  8. 18. a way to simplify expressions
  9. 19. the input of a variable
  10. 20. a function that refers to two closely related concepts
  11. 21. a three demensional square
Down
  1. 1. an equation that makes a straight when graphed
  2. 2. a tool used to solve math equations
  3. 4. a shape with three sides
  4. 5. taking away two things
  5. 6. the output of a function
  6. 7. the set of inputs accepted by the function
  7. 9. a letter representing a value
  8. 11. a three demensional circle
  9. 14. the quantity that expresses the extend of a two-dimensional shape
  10. 17. a form of mesurement measured in tenths