Geometry symbols

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Across
  1. 1. rad
  2. 5. perpendicular segment
  3. 8. infinite line
  4. 9. between the ratio
  5. 11. segment line from a point to point b
  6. 12. same size and shape
  7. 14. angle 90°
  8. 15. deg
Down
  1. 2. between points x and y
  2. 3. double prime
  3. 4. parallel lines
  4. 6. equivalent of geometric shape
  5. 7. form by two Ray's
  6. 10. triangle shape
  7. 13. line that starts from point a