This a visual chart and poster that you can refer to when teaching, reteaching and using angle relationship knowledge to solve for missing value or variable. Students will adapt to refer to chart during practice, and gradually retain the knowledge during tests and/or exams. I've had this chart when teaching this unit. Also, I had my kids glue this chart in their Interactive Notebook for reference. While my peers talked about how it was difficult it was for students to retain this knowledge, I ha