This Instructional Activity is a part of the Lesson 1, Unit 6, Grade 7. Lead students through a discussion regarding the Angles on a Line fact that concludes with definitions of supplementary and complementary angles. Angles on a Line refers to two angles on a line whose measurements sum to 180 degrees. Could we use this fact if the two angles are not adjacent, but their measurements still sum to 180? Could we still call them angles on a line?
