GEOMETRY SYMBOLS PUZZLE

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Across
  1. 3. perpendicular lines (90° angle)
  2. 5. triangle shape
  3. 6. arcminute, 1° = 60′
  4. 8. same shapes, not same size
Down
  1. 1. 1 turn = 360°
  2. 2. parallel lines
  3. 4. grads angle unit
  4. 7. radians angle unit