Geometry symbols

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Across
  1. 2. (≅)
  2. 4. (↔)
  3. 6. Angle (∟)
  4. 9. (∞)
  5. 10. (π)
  6. 11. Segment (—)
  7. 13. (⌒)
  8. 14. Lines (⊥)
Down
  1. 1. Lines (∥)
  2. 3. (•)
  3. 5. (△)
  4. 7. (→)
  5. 8. (∼)
  6. 12. (○)
  7. 13. (∠)