Geometry

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Across
  1. 4. whe 3 or more lines, rays, or segments intersect in the same point.
  2. 5. a segment, ray, line, or plane that is perpendicular to a segment at its midpoint
  3. 6. of a triangle
  4. 7. same distance from each figure
  5. 9. a segment that connects midpoints of 2 sides of a triangle
  6. 10. segment from a vertex to the midpoint of the opposite side
  7. 11. point of concurrency of the 3 medians
  8. 12. (y₁+y₂)/2
Down
  1. 1. = √[( x₂ - x₁)² + (y₂ - y₁)²]
  2. 2. the perpendicular segment from a vertex of the triangle to the line containing the opposite side
  3. 3. thpoint at which the lines containing the 3 altitudes of a triangle intersect
  4. 8. the point of concurrency of the three angle bisectors of a triangle