This applet walks through the ruler and compass construction of a line[br]through a given point C, parallel to a given line AB.<br>[br]Drag the Steps slider to see the steps of the construction. The[br]construction assumes that the user has already worked through the[br]construction of a line perpendicular to a given line.

The two points, A and B, which[br]define the line, and the given point C, can be moved to[br]new positions by dragging.