crossword puzzle

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Across
  1. 2. tendency a measure of the middle value of the data set
  2. 3. concerned with the properties and relations of points, lines, surfaces,and solids
  3. 5. The extent to which something is probable
  4. 7. A statement that the values of two mathematical expressions
  5. 9. measure of the amount of space inside of a solid figure
Down
  1. 1. A surface of which one end or side is at a higher level than another
  2. 2. A numerical or constant quantity
  3. 4. A symbol for a number we don't know yet
  4. 6. The part of mathematics in which letters and other symbols are used to represent numbers and quantities in formulae and equations.
  5. 8. The space between two intersecting lines or surfaces at or close to the point where they meet.