Geometry Puzzle

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Across
  1. 4. lines intercepting lines that form a right angle
  2. 6. infinite flat surface
  3. 7. infinite set of points in two dirctions
  4. 8. part of a line with two end points
  5. 9. a line with one end point that continues through another
Down
  1. 1. lines they dont cross
  2. 2. lines lines that cross in one point
  3. 3. points that share the same plane
  4. 4. a dot with no size or shape
  5. 5. points that share the same line
  6. 8. lines dont inercept