9 point circle

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Across
  1. 2. Point of cncurrency of medians
  2. 4. Circle touches the three sides of triangle
  3. 6. Point of concurrency of angles bisector
  4. 7. Point of concurrency of altitudes
Down
  1. 1. Point of concurrency of sides perpendicular bisector
  2. 2. Circle touching the vertices of triangle
  3. 3. Line segment from vertex to the midpoint of opposite side
  4. 5. Perpendicular from vertex to the opposite side