Example 4

Use a compass and a straightedge to construct a line parallel to line through point that is not on the line. Note: Drag the blue points to try different constructions.
  1. Draw line with point not on the line.
  2. Construct a line perpendicular to line through point .
  3. Draw the perpendicular line. Line is perpendicular to line .
  4. Construct a second line perpendicular to line .
  5. Draw the perpendicular line. Do not erase any of your markings. Line is perpendicular to line . Line is parallel to line .
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