Euclid's geometry

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Across
  1. 3. 5 euclid's
  2. 5. linked to geometry
  3. 7. 23
  4. 9. propositions
Down
  1. 1. 1 dimensions
  2. 2. 2 dimensions
  3. 3. 90 degree
  4. 4. 0 dimensions
  5. 6. truth
  6. 8. 3 dimensions