1. Complementary angles are angles that have the same measure.
2. Complementary angles are two angles whose measures have a sum of 90°.
3. Supplementary angles are angles whose measures have a sum of 180°.
4. Vertical angles are the opposite angles formed by two intersecting lines. They are congruent because they have the same measure.
5. Adjacent angles are pairs of angles that share a vertex and one side but do not overlap.

Would you like more details or further clarification on any part of this? Here are some related questions to consider:

1. What are the properties of vertical angles?
2. How do you identify complementary angles in geometric diagrams?
3. Can two angles be both complementary and supplementary at the same time?
4. How can you prove that vertical angles are congruent?
5. How are adjacent angles different from complementary angles?

Tip: Remember that complementary angles always add up to 90° and supplementary angles add up to 180°.