GEOMETRY SYMBOLS

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Across
  1. 3. same shape, not same size
  2. 6. ≅
  3. 7. grads angle unit
  4. 9. equals to 90°
  5. 10. °
  6. 12. radians angle unit
  7. 13. form by two rays
  8. 15. '
Down
  1. 1. ⊥
  2. 2. |x-y|
  3. 4. line from point A to point B
  4. 5. "
  5. 8. line that start from pint B
  6. 11. ||
  7. 14. π