GEOMETRY SYMBOLS

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Across
  1. 5. parallel line
  2. 6. ⊥
  3. 8. ∟
  4. 11. △
  5. 13. ∡
  6. 15. line that start from point A
Down
  1. 1. lx-yl
  2. 2. rad
  3. 3. 1 turn=360deg
  4. 4. same shapes, not same size
  5. 7. arcminute, 1°=60'
  6. 9. formed by two rays
  7. 10. grad
  8. 12. infinite line
  9. 14. arc from point A to point B