I used this One Big Square Task with my trigonometry students to review 45-45-90 special right triangles.

I found this task in the Open Curriculum Task Database. I loved listening to the conversations my students had as they struggled through this problem. And, I mean “struggle” in the best possible way!

## Free Download of One Big Square Task

One Big Square Task (PDF) (1483 downloads )

One Big Square Task (Editable Publisher File ZIP) (771 downloads )

## More Geometry Teaching Resources

- Geometry Jokes and Puns
- 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