Geometry

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Across
  1. 2. 6 sides
  2. 4. Line
  3. 7. Up in the air
  4. 9. Horizon
Down
  1. 1. 5 sides
  2. 3. Opposite to perpendicular
  3. 5. You find them it Egypt
  4. 6. 8 sides
  5. 7. The tip of an arrow is also a
  6. 8. Angle 90 degrees