Math ISU

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Across
  1. 3. meeting at a single point
  2. 4. the point at which the three altitudes a triangle meet
  3. 6. a plant figure with three straight sides and three angles
  4. 7. line segment joining two points on a curve
  5. 9. the point where the three medians of a triangle intersect
  6. 10. a four sided plane reflection figure with opposite sides parallel
Down
  1. 1. the point in which the three bisectors of a triangle meet
  2. 2. the point of intersection of the three right bisectors of a triangle
  3. 5. lying on the same line
  4. 8. common endpoint of two or more rays or line segments