Crossword Puzzle 2 Geometry Symbols

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Across
  1. 1. line that start from point A
  2. 6. infinite line
  3. 7. Δ
  4. 8. = 90°
  5. 10. deg
  6. 12. arcsecond, 1′ = 60″ (″)
  7. 13. |x-y|
  8. 14. π = 3.141592654...
Down
  1. 2. formed by two rays (∠)
  2. 3. line from point A to point B
  3. 4. perpendicular lines (90° angle)(⊥)
  4. 5. same shapes, not same size
  5. 9. arc from point A to point B
  6. 11. radians angle unit
  7. 15. equivalence of geometric shapes and size