Angle pair relationships is always one of the first few lessons I teach in Geometry. It is SO important for students to understand adjacent angles and linear pairs of angles early, to help prevent misunderstandings later.
For this interactive notebook page, I would have the students write the definition of adjacent angles at the top along with a diagram. Sometimes, students just need to write. Also, it gives them the chance to put the definition into their own words.
The foldable goes underneath. The foldable has tabs for linear pair, vertical angles, complementary angles, and supplementary angles. Under each tab, there is the definition, a diagram, and an example. This foldable is in my Teachers pay Teachers store.