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

Drag the Steps slider to see the steps of the construction. The construction assumes that the user has already worked through the construction of the perpendicular bisector of a line segment.[br][br]The two points, A and B, which define the line, and the given point C, can be moved to new positions by dragging.