GEOMETRY SYMBOLS

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Across
  1. 4. ~
  2. 5. radians
  3. 7. ⊥
  4. 10. ⌢
  5. 11. ≅
  6. 12. ∢
  7. 14. grad
  8. 15. 1 turn=360°
Down
  1. 1. ∆
  2. 2. =90⁰ angle
  3. 3. '
  4. 6. |x-y|
  5. 8. ||
  6. 9. line that start form point A
  7. 13. π