Math Crossword!

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Across
  1. 3. a symbol that represents a number.
  2. 6. to find the value of a numerical expression.
  3. 8. the number that is used as a factor.
  4. 9. a polygon with three angles.
  5. 10. an angle that is less than 90 degrees.
  6. 12. a smaller number written above another number to find how many times the number under the smaller number is used as a factor.
  7. 13. to rewrite a fraction as a fraction with a smaller numerator and denominator.
  8. 16. when the numerator and denominator of a fraction have a common factor.
  9. 18. the horizontal axis of a coordinate grid.
  10. 19. a standard measurement.
Down
  1. 1. the quarter of a plane.
  2. 2. to find a solution to a problem.
  3. 3. the measure of the amount of space by an object.
  4. 4. a unit for measuring triangles, squares, polygons, etc.
  5. 5. parallel_ _ _ _ _.
  6. 7. the point on a two-dimensional coordinate grid.
  7. 11. the counting numbers and their opposites.
  8. 14. the size of each equal group made from data values.
  9. 15. a relation in which every input value is paired with exactly one output value.
  10. 17. the vertical axis of a coordinate grid.