Hello

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Across
  1. 6. Physics but in Math books
  2. 8. (0,0)
  3. 9. Magnitude with direction
  4. 10. Unknown
Down
  1. 1. It's Huuuuuge
  2. 2. Matrix A^T = A
  3. 3. rise over run
  4. 4. Average
  5. 5. Lines that never meet
  6. 7. Rectangular parallelepiped