Concurrent Points

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Across
  1. 3. branch of mathematics concerned with the properties and relations of points, lines, surfaces
  2. 4. Point of concurrency for altitudes
  3. 5. has no dimension, it is represented by a dot
  4. 6. has one dimension, it is represented by a line with two arrowheads, but it extends without end.
Down
  1. 1. Point of concurrency for Perpendicular bisectors
  2. 2. Point of concurrency for medians