I use these classifying triangles by angles and sides notes with my pre-calculus students as part of our first unit of the year which covers mainly geometry review.

Especially with the pandemic, I have to spend quite a bit of time reviewing geometry before we can jump properly into trigonometry.

I have my students fill out separate charts for classifying triangles by angles and classifying triangles by sides. We write specific notes about exactly what makes right triangles, obtuse triangles, acute triangles, scalene triangles, isosceles triangles, and equilateral triangles.

On the back of the notes, students practice using these classification tables to classify six different triangles both by their sides and their angles.

## Free Download of Classifying Triangles by Angles and Sides Notes

Classifying Triangles Notes (PDF) (678 downloads)

Classifying Triangles Notes (Editable WORD Document) (438 downloads)

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