Right Triangles Unit

A Peek Inside My Right Triangles Unit - Freebies Included!

Mrs. GeometryTeacherFriend and I have been working hard on our Right Triangle Unit, which we start Tuesday.  She has been been doing a lot of work updating the homework assignments and I have been planning the activities and daily practice.  The goal is to make this a richer unit than it was last year.  It drives me nuts when we get to area and solids and students can't remember special right triangle rules.  This year, I'm going to try to make them practice, practice, practice.  I don't care if they can reason through it, I want it to be automatic as well.  

Anyway, this is the plan for the unit.  It is a typical breakdown of what each unit I do looks like.  Believe it or not, this will suffice as my lesson plans for the whole unit (I don't have to turn in lesson plans.)  I do bell work at the beginning of every class.  I usually make it up every morning.  However, sometimes I have special bell work planned.  My class periods are normally 45 minutes, but occasionally we have block periods.

Day 1 - Pythagorean Theorem
Pythagorean Theorem Notes
Pythagorean Theorem Word Problem Task Cards - I haven't decided what I'm going to do with the task cards yet.  I'll probably decide on the fly.  I only have one set printed, so we'll probably play Scoot! or do white board practice.

A Peek Inside My Right Triangles Unit - Freebies Included!

Day 2 - Converse of the Pythagorean Theorem 
Mini-Lesson (Reminder) of Simplifying Radicals  - We'll just work through these problems together.
Converse of Pythagorean Theorem Notes

Day 3 - Similar Right Triangles
Simplifying Radicals Matching Cards  - (as long bell work) They'll work with their partners and go through each set matching a radical expression to it's simplified version.
Similar Right Triangles Notes - This lesson takes FOREVER because the kids have a really hard time remembering the relationships.  It will take more than half of the class period, but that's ok.

A Peek Inside My Right Triangles Unit - Freebies Included!

Day 4 - Review
Start Homework in Class

A Peek Inside My Right Triangles Unit - Freebies Included!

Day 5 - 45-45-90 Triangles
Short Discovery Activity
45-45-90 Triangles Notes
Start Homework in Class

Day 6 - 30-60-90 Triangles (75 minute class period)
30-60-90 Triangles Notes
Special Right Triangles Trashketball 

Day 7 - Review
Day 8 - Mid-Unit Test

Day 9 - Tangent Ratio
Short Discovery Activity
Tangent Ratio Notes
Start Homework in Class

Day 10 - Sine, Cosine, Tangent
Sine, Cosine, Tangent Notes

Day 11 - Angles of Depression and Elevation
Short Trig Ratios Quiz
Angles of Depression and Elevation Notes

Day 12 - Review
Day 13 - Unit Test

Phew!  It really took a lot of planning.  The students have homework every night.  We changed a lot of the textbook problems, so we had to type up new homework keys for all of the assignments.   #teacherproblems

If you're teaching right triangles anytime soon, I hope it helps to get a glimpse into my class :)  Do you have anything you especially like to do during this unit?


  1. Hi Mrs. E! Found your blog through the TPT forum. Love it! I teach 3rd grade math so this is way out of my league, but I am getting so many great ideas here. I've never seen the "box" downloads right on a page before.

    I also love the "stations maze." That one is going onto my Pinterest board!

  2. Thanks! I'm glad you found something useful!

    This is how I embedded the box downloads: When you're looking at your files on Box, there is a little button that says "Share". Then, go to the little drop down menu choose "Share" again, then pick "Embed into your Site". Then, they give you the html code that you can put into you post.


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