# How to Construct Two Parallel Lines

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Drawing parallel lines without a ruler can be hard. Here, i show you how with just a straightedge and a compass. (NO RULERS)

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## Step 1: Step One

The first thing you do is draw a straight line. It can be any length. Then draw a point above the line.

## Step 2: Steps Two & Three

Place the stylus of the compass on the point, and swing the compass down to make two marks on the line. These points of intersection are equidistant from the original point. Then, draw marks below the line, by placing the stylus on the points of intersection. Draw a line from where these two meet to the original point (the red arrow marks this)

## Step 3: Step Four & Five

Mark two points on the 2nd line by placing the compass stylus on the original (red arrow) dot, and swinging it down and up. Then, swing the compass from both of these new pointsof intersection , on either side of the line, to form 2 new points.

## Step 4: Step Five

Connect these 3 points, and now you have 2 parallel lines! The original line and the most recently made are parallel with each other. This is because you formed 2 perpendicular lines, which are 90 degrees each. The 90 degrees x2 equals 180 degrees, therefore producing parallel lines.

## 1 Person Made This Project!

• ## 14 Discussions

Simpler method- make two circles of equal diameter, centered on the first line segment. Then, put a point at the most extreme edge of those circles on the same side of the line. Draw a line segment through those two points, so that it is tangential to the two circles and parallel to the other line segment.

Yeah. You bring up an interesting point, but the definition of parallel lines is, two lines that have the same slope but a different Y-intersect. Which means that even lines going on forever will still be parallel. And if you are talking about the fact that only segments are drawn than you must understand that infinities do not exist in nature so it would be impossible to draw. The segments that are drawn represent the theoretical concept of infinite lines using arrows (which can be seen on the final step).

And further so, as a Electronic Engineer and Scientist I use "i" which is the representation of the square root of minus one  (-1)½ ...
That is an imaginary number used in Real-World electrical solutions.

You are polite and young man of 14 still to go through a lot
of matriculation,  Allow me to suggest a modicum of open
mindedness about our Wonderful World and high level concepts.
Do you know there are more scientific papers of note being produced
and published then any one person can review in a lifetime.

Infinity is a fun target after a googleplexing some numbers.