Geometry Symbol

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Across
  1. 2. '
  2. 4. |x-y|
  3. 6. grad
  4. 8. triangle shape
  5. 10. same shapes, not same size
  6. 12. rad
  7. 13. infinite line
  8. 14. formed by two rays
Down
  1. 1. perpendicular lines
  2. 2. ||
  3. 3. rad
  4. 5. equivalence of geometric shapes and size
  5. 7. "
  6. 9. line that start from point A
  7. 11. grad