20 Math terms crossword

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Across
  1. 2. action of taking away is?
  2. 4. opposite of subtract.
  3. 5. a 8 sided polygon with 8 vertices.
  4. 6. numbers that are in between whole numbers
  5. 8. a polygon with 5 sides and 5 vertices.
  6. 12. the opposite of multiply.
  7. 13. opposite of divide.
  8. 14. a closed 6 sided polygon
  9. 16. an angle that measures less than 90 degrees.
  10. 17. a tool or device used to measure length and draw straight lines.
  11. 18. a single number or value that best represents a set of data
  12. 19. a plane figure with four equal straight sides and four right angles.
Down
  1. 1. a device that performs arithmetic operations on numbers.
  2. 3. a plane figure with four straight sides and four right angles, especially one with unequal adjacent sides, in contrast to a square.
  3. 4. a branch of mathematics that uses mathematical statements to describe relationships between things that vary.
  4. 7. an angle measuring greater than 90 degrees but less than 180.
  5. 9. a polygon three sides and having three vertices.
  6. 10. a line that is used to make or mark measurements
  7. 11. what do you find when you use the equation LxWxH?
  8. 15. a line over a number