What's the Point?

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Across
  1. 2. a line that intersects a circle in one point
  2. 5. on the same point
  3. 8. the point where the altitudes of a triangle intersect
  4. 10. a set of coplanar points equidistant from a given point
  5. 11. angles that share a common side and vertex
  6. 12. angles whose sides form opposite rays
  7. 13. a line that intersects a circle in 2 points
  8. 15. chord that passes through the center of a circle
  9. 16. segment joining two points on a circle
  10. 18. on the same plane
  11. 20. set of all points
Down
  1. 1. endpoint of two rays
  2. 3. two rays with the same endpoint
  3. 4. the point equidistant from all 3 sides of the triangle and is the center of the inscribed circle
  4. 6. the point where all the medians of a triangle intersect
  5. 7. noncoplanar lines
  6. 9. a line that connects two midpoints of a triangle
  7. 11. perpendicular segment from the vertex to the line containing the opposite side
  8. 14. the point equidistant from all 3 vertices of the triangle and is the center of the circumscribed circle
  9. 17. a point that divides a segment into two congruent segments
  10. 19. segment joining the center to a point on a circle