Chapter 9: TE Right Triangle Trigonometry - TI Created by: CK-12 Texas Instruments Geometry Teacher's Edition Read Resources Details Chapter Outline 9.1. The Pythagorean Theorem9.2. Investigating Special Triangles9.3. Ratios of Right Triangles Chapter Summary Image Attributions Description This chapter tasks students with proving the Pythagorean theorem using the Cabri Jr. application in addition to covering the properties of special triangles such as the 45-45-90, 30-60-90, and isosceles triangles. Editors: Lori Jordan, (LoriJ) Categories: mathematics Geometry Grades: 9 , 10 Date Created: Feb 23, 2012 Last Modified: Apr 29, 2014 You can only attach files to None which belong to you If you would like to associate files with this None, please make a copy first.