When constructing parallel lines with a compass and straightedge, how should you start the construction?

Measure the length of the original line and make an arc.
Create a line that intersects the given line with your straightedge.
Open the compass to the width of the line and draw two arcs.
Use a straightedge to create two arcs above and below the line.

Question

When constructing parallel lines with a compass and straightedge, how should you start the construction?

 Measure the length of the original line and make an arc.
 Create a line that intersects the given line with your straightedge.
 Open the compass to the width of the line and draw two arcs.
 Use a straightedge to create two arcs above and below the line.

tkhunny · Answer

In 2-space, 2 perpendiculars make a parallel.  Does one of your choices lead to a perpendicular?

The word "measure" generally is not allowed.

help_people · Answer

is it B @tkhunny?

help_people · Answer

a is not correct

help_people · Answer

@Hero

hero · Answer

Which do you think is the first step?

help_people · Answer

b

help_people · Answer

@Hero ?

hero · Answer

b is correct

hero · Answer

Sorry for the delay. My browser gets laggy at the most Inconvenient times.

tkhunny · Answer

I'd do the last one.  This is the first step to the construction of a perpendicular.

hero · Answer

@tkhunny explain how to use a straightedge to create two arcs.

tkhunny · Answer

Whoops.  Sleep reading.  Correction noted.