Before jumping into trigonometry, I used this parallel lines cut by a transversal foldable to review some crucial angle facts with my students.

I borrowed the amazing Kathryn’s Angles Formed by Parallel Lines Cut by a Transversal Foldable.

Here’s the inside:

Kathryn took many more detailed pictures of the inside flaps and posted them on her blog. You should definitely check it out!

## More Geometry Teaching Resources

- Right Triangle Trig Formula Sheet
- Pythagorean Theorem and Distance Formula Notes
- Pythagorean Theorem Day Celebration Ideas
- 25 Fun Geometry Puzzles
- Missing Angles Notes
- Classifying Triangles by Angles and Sides Notes
- Sankaku Puzzles
- Tricky Triangles Puzzle
- Triangular Turkey Puzzle
- Three of Five Puzzle
- SOH CAH TOA Notes
- Let’s Make Squares Activity