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### Course: High school geometry>Unit 3

Lesson 8: Constructing lines & angles

# Geometric constructions: parallel line

We can parallel lines with compass and straightedge by creating a pair of congruent corresponding angles on a transversal.

## Want to join the conversation?

• I'm enjoying these in person videos ;)
• Are there other ways to find out if they are parallel?
• You can use a protractor and measure both angle measures and then check if they are the same which will then show if they are parallel or not
• i have a better idea
1. place the needle end of the compass on the point and make the distance a bit further than the line, then draw an arc so that there are 2 intersecting points on that line
2. let those two intersections be your line segment and bisect it
3. draw a circle with the compass needle at the original point, let those intersections be your new segment
4. bisect that segment

if you need any further elaboration let me know, im better with showing people rather than telling
• Why does it say [David] in the subtitles at the beginning of the video?
• Hello @Bot,

Subtitles often have to be a paraphrase of what is actually said in order to make it possible to read them at the same speed as the spoken dialogue. It conveniently bridges the language gap of global audiences while preserving the original audio performances. Subtitles are a form of captioning used to translate the audio dialogue from one language into another. Simply put, subtitles translate a video's language into another. You'll see subtitles used in many foreign films and programs. On the other hand, Closed Captions are in the same language as the original audio.

I HOPE THIS HELPS!
(1 vote)
• I have tried to do this 5 times on a piece of paper and not once have i gotten parallel lines. PLEASE HELP!