Math Crossword Puzzle

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Across
  1. 3. Octagon
  2. 4. Division
  3. 5. Parallelogram
  4. 9. Trigonometry
  5. 10. Triangle
Down
  1. 1. Multiplication
  2. 2. Algebra
  3. 6. Addition
  4. 7. Subtraction
  5. 8. Geometry