geometry symbols

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Across
  1. 3. (→)
  2. 4. Lines (∥)
  3. 7. (⌒)
  4. 9. (~)
  5. 10. (•)
  6. 12. (○)
  7. 13. (∠)
  8. 15. (↔)
Down
  1. 1. (≅)
  2. 2. Lines (⊥)
  3. 5. (r)
  4. 6. (⌀)
  5. 8. (⏜)
  6. 11. (△)
  7. 14. Segment (—)