Math X Word Puzzle

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Across
  1. 3. information that is gathered by counting, measuring, questioning, or observing
  2. 5. shape formed by two lines or rays that diverge from a common point or vertex
  3. 6. plane surface of a three‐dimensional figure
  4. 8. a line segment joining two nonconsecutive vertices of a polygon
  5. 10. a quantity that does not change
Down
  1. 1. a special kind of relation where each x‐value has one and only one y‐value
  2. 2. lines that never intersect
  3. 4. mathematical sentence of equality between two expressions
  4. 7. the line segment where two faces of a solid figure meet
  5. 9. the use of letters of the alphabet to represent numbers in equations, formulas, and rules