GEOMETRY SYMBOLS

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