What is a necessary step for constructing perpendicular lines through a point off the line

In this video you will learn how to create a perpendicular line through a point off the line using a compass.

Perpendicular Line Through a Point off the Line: A perpendicular line that cuts through a given point, forming right angles according to the given line.

Procedure:

1. Use a compass to draw an arc with one end of the compass on the given point and goes past the given line.
2. At one intersection, make an arc that goes beyond the given point.
3. Do the same at the other intersection without changing the radius.
4. Draw a straight line that cuts where the two arcs intersect and the given point, which is the perpendicular line that goes through a point off a line.

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