Basic geometric Ideas

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Across
  1. 2. has one starting point and going in one direction endlessly
  2. 4. line segment extended one point and beyond other point in other direction without any end
  3. 6. determines a location
  4. 7. two lines are intersecting at one point
Down
  1. 1. lines lines do not have any intersecting point
  2. 3. has two fixed points
  3. 5. made up by line segments