Geometry Symbol

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Across
  1. 3. ≅
  2. 6. line frompointAtoB
  3. 7. arcsecond,1°=60”
  4. 9. ∠
  5. 12. ⊥
  6. 14. rad
  7. 15. deg
Down
  1. 1. π
  2. 2. ||
  3. 4. 90°
  4. 5. "’"arcminute,1°=60’
  5. 8. ~
  6. 10. ∆
  7. 11. grad
  8. 13. |x-y|