Crossword Puzzle 2 Geometry Symbols

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Across
  1. 5. π = 3.141592654...
  2. 6. deg
  3. 7. equivalence of geometric shapes and size
  4. 9. ∥
  5. 10. arc from point A to point B
  6. 11. arcsecond, 1′ = 60″ (″)
  7. 12. Δ
  8. 13. line that start from point A
  9. 14. infinite line
Down
  1. 1. |x-y|
  2. 2. = 90°
  3. 3. perpendicular lines (90° angle)(⊥)
  4. 4. line from point A to point B
  5. 8. radians angle unit
  6. 10. formed by two rays (∠)