Mathematics

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Across
  1. 2. What every number is divisible by
  2. 3. Length times width, for a rectangle
  3. 5. Positive numbers, negative numbers and zero.
  4. 8. They may by parallel or perpendicular.
  5. 9. They´re found by adding several quantities
  6. 10. Grouping represented Venn diagram.
Down
  1. 1. Three-dimensional geometric figure.
  2. 4. 90° intersection of lines
  3. 6. than (what "<" means in math)
  4. 7. Tool used to draw circles