Geometry Symbols

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Across
  1. 2. grad
  2. 4. ″ or arcsecond
  3. 6. Δ
  4. 8. ⊥
  5. 9. formed by two rays
  6. 11. is the ratio between the circumference
  7. 12. line that start from point A
  8. 14. deg or °
  9. 15. infinite line
Down
  1. 1. rad
  2. 3. same shapes, not same size
  3. 5. ′ or arcminute
  4. 7. line from point A to point B
  5. 10. ∥
  6. 13. arc from point A to point B