[Copy of] IM 8.1.15 Adding the Angles in a Triangle

Open Up Resources Illustrative Mathematics Grade 8 Unit 1 Lesson 15: Adding the Angles in a Triangle Available for FREE at: https://im.openupresources.org/8/students/1/15.html#introduction Allow students to record their thinking. Use Classroom Communication Tools to guide class discussion. See Teacher's Guide for additional notes and support, available for FREE at: https://im.openupresources.org/8/teachers/1/15.html#1-15-lesson-plan

By John Thompson