math definitions

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Across
  1. 3. a fixed rule for carrying out a procedure of math
  2. 4. how much square units needed to fill a space
  3. 6. an area that a variable or constant
  4. 7. a set of rectangles of restricted height that match data
  5. 8. on a coordinate plane where the 2 number lines meet in the middle
  6. 9. the sum of values divided by the number of values
  7. 11. combining 2 things that make a whole
  8. 12. adding a given number to get to 0
  9. 13. an angle that is more than 0 degrees but less than 90 degrees
  10. 14. 2 lines that are joined at an endpoint
  11. 15. type of mathematics that use variables to generalize rule of numbers and numerical equations
  12. 16. the length of a line that connects to a vertex to another line
Down
  1. 1. a block used to show 100%
  2. 2. the base times height the cut in half
  3. 5. a combination of at least arithmetic operation, variable, and numbers
  4. 6. how much a number is away from 0
  5. 10. for every number there is a negative number to get 0
  6. 12. a shape where all 3 angles are less than 90 degrees