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Parallel and Perpendicular Lines Foldable

Today, I want to share a parallel and perpendicular lines foldable I used to introduce the concepts of these different types of lines to my Algebra 1 classes.

Quote of the Day: “I’m going to name my kid ‘Perpendicular.'”

parallel vs perpendicular lines foldable in interactive notebook.

I’m not the biggest fan of what I had my students write inside the foldable.  It was a little wordy, and I will tell you that the amount of writing decreased with each class period that I taught this.  I put this together at the last minute, and it shows.  Next time I cover this topic, I will revisit this and revise.  Any advice would be greatly appreciated!  

inside of parallel vs perpendicular lines foldable in interactive notebook.

The following year’s foldable for this same topic was almost identical.

outside of parallel vs perpendicular lines foldable in interactive notebook.
inside of parallel vs perpendicular lines foldable in interactive notebook.

Free Download of Parallel and Perpendicular Lines Foldable Template

3 Door Foldable (PDF) (4047 downloads )

More Activities for Teaching Parallel and Perpendicular Lines


Monday 14th of November 2016

Thanks so much for the great foldable! I am picky, and wanted to have graph paper and cut down on the amount of writing my kids had to do, so I created the following version of your foldable in a google doc! I figured I should share it back with you! Thanks again!!

Miss Freeze

Thursday 21st of November 2019

Oooh, we're using this today!!!! Thank you for making this so I don't have to write out twenty copies!!!


Monday 2nd of January 2017

Thank you! I am a stickler on graphing so thanks for the printed graphs!

Sarah Carter (@mathequalslove)

Friday 25th of November 2016

Thanks for sharing!!!


Tuesday 17th of November 2015

I altered the foldable a little bit I left out Neither and after we defined Parallel and Perpendicular I gave an example and we pasted graph paper into the foldable and graphed the examples. I also had this open up and down instead of left to right (I hope that makes sense).

Sarah Carter (@mathequalslove)

Tuesday 17th of November 2015

Thanks for sharing! Graph paper is an AWESOME addition!

Katie Mac

Wednesday 3rd of December 2014

I used this today in my class and it definitely helped for my ELLs! After I showed one example, I had the kids draw their own examples, which definitely helped clear up some confusion on perpendicular vs. intersecting. One girl even drew two lines that didn't intersect on her page but used arrows to show that they would eventually intersect. Awesome math conversation!

Thanks so much for your stuff, I always love it!

Sarah Carter (@mathequalslove)

Thursday 19th of February 2015

I love reading comments like this!


Monday 21st of April 2014

Instead of "neither", I would use the word "intersecting". Thanks for the idea :)

Sarah Carter (@mathequalslove)

Saturday 26th of April 2014

Ooooh! What if you had two flaps: Parallel and Intersecting? Then, you opened the Intersecting flap to reveal two more flaps: Perpendicular and Intersecting but not Perpendicular. You have given me an idea! Thanks!


Sunday 10th of March 2013

I would modify this to use the space on the flap for example equations of each type. Love this, thanks for the idea!

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