Geometry symbols

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Across
  1. 3. ⌒
  2. 4. △
  3. 9. 90 degrees
  4. 10. formed by two rays
  5. 12. ⊥
  6. 13. arcsecond,1'=60"
Down
  1. 1. ∡
  2. 2. rad
  3. 5. line that start from point A
  4. 6. line from point A to point B
  5. 7. °
  6. 8. ≅
  7. 11. ~
  8. 13. |x-y|
  9. 14. π