Sorin's Geometry Puzzle -October

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Across
  1. 1. What other subject is Sorin teaching?
  2. 4. The point of intersection of the medians.
  3. 6. Sorin's favorite color
  4. 7. A word describing lines that meet at a point
  5. 8. The longest side of a right triangle
  6. 10. Discovered a recently covered theorem
  7. 13. The point of intersection of perp bisectors
Down
  1. 2. A perpendicular line from the vertex to the side
  2. 3. A line that connects a vertex to a midpoint
  3. 5. A circle that passes through the 3 vertices
  4. 9. The point of intersection of altitudes
  5. 11. The point of intersection of angle bisectors
  6. 12. A circle that fits inside a triangle