1. Types of Angle Pairs Foldable
Fold a full sheet of paper into quarters. Make 2 folds along the short way of the paper so that it
is divided into 4 equal rows. Cut slits into the folds at the top and bottom of the page. Fold over the flaps so that there are four “doors”. Fold
that over one more time so that the “doors” hide the inside.

2. Adjacent Angles Vertical Angles Complementary Angles Supplementary
On the outside “doors”, write each type of angle shown in this slide.

3. 2 angles that share a side and a vertex.
Adjacent Angles
2 angles that share a side and a vertex.
(Side by Side Angles)
Example:
Open the upper left “door”. On the cut part (the flap that can be opened), write the definition. On the inside of the foldable (the uncut part), copy the example.

4. 2 angles that are Facing each other. Vertical Angles are congruent
(Opposite Angles)
Vertical Angles are congruent
(Same degrees.)
Example: 2 1 1
Open the upper right “door”. On the cut part (the flap that can be opened), write the definition. On the inside of the foldable (the uncut part), copy the example. 2

5. Complementary Angles Two angles whose measures add to 90⁰. Example:
Open the lower left “door”. On the cut part (the flap that can be opened), write the definition. On the inside of the foldable (the uncut part), copy the example.

6. Supplementary Angles Two angles whose measures add to 180⁰. Example:
Open the lower right “door”. On the cut part (the flap that can be opened), write the definition. On the inside of the foldable (the uncut part), copy the example.

7. Practice State the relationship of angle 1 and 2 in each case. 1. 2.3. 4.
On a separate sheet of paper, practice these four problems using your foldable. 1 2 2 1

8. Practice Problems Answer Key Complementary and adjacent
Supplementary and adjacent
Vertical
Check your answers!