Geometric Properties

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Across
  1. 3. the point at which the three altitudes of a triangle meet
  2. 5. the point at which the three angle bisectors of a triangle meet
  3. 6. lying on the same line
  4. 7. a measure of the steepness of a line
  5. 9. the point where the three medians of a triangle intersect
  6. 10. the point of intersection of the three right bisectors of the sides of a triangle
  7. 11. a quadrilateral with two pairs of opposite sides that are parallel
  8. 12. the point that divided the line segment into two equal segments
Down
  1. 1. a line segment joining two points on a curve
  2. 2. also known as a right bisector
  3. 4. the set of all points in the plane that are equidistant from a fixed point called the centre
  4. 8. meeting at a single point