Geometry symbols

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Across
  1. 1. grads angle unit
  2. 3. parallel lines
  3. 6. arcminute, 1° = 60′
  4. 7. ΔABC≅ ΔBCD
  5. 8. line that start from point A
  6. 9. to ∆ABC≅ ∆XYZ
  7. 10. | x-y | = 5
  8. 11. infinite line
  9. 14. 360° = 2π rad
Down
  1. 2. ∆ABC~ ∆XYZ
  2. 4. line from point A to point B
  3. 5. π = 3.141592654...is the ratio between the circumference and diameter of a circle
  4. 6. perpendicular lines (90° angle)
  5. 12. angle α = 90°
  6. 13. ∠ABC = 30°