math cross word

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Across
  1. 2. the region inside the circle bounded by two radii
  2. 7. a segment whose endpoints are a vertex of a triangle
  3. 8. the distance along the arc
  4. 9. a polygon with a vertex on the circle
  5. 10. the product of two numbers that equal -1
  6. 11. when perpendicular bisectors are drawn for every side of a triangle
Down
  1. 1. a circle that contains all the vertices of apolygon
  2. 3. the point of concurrency
  3. 4. a style of proof
  4. 5. the point of concurrency of the three medians
  5. 6. a style of proof