- Kinds of an Angle
- Concept of Adjacent Angles
- Concept of Complementary Angles
- Concept of Supplementary Angles
- Vertically Opposite Angles
- Finding Unknown Angles Involving Adjacent Angles
- Finding Unknown Angles Involving complementary Angles
- Finding Unknown Angles Involving Supplementary Angles
- Finding Unknown Angles Involving Vertically Opposite Angles
- Finding Unknown Angle of a Triangle

- Congruent Triangles
- Side-Side-Side Postulate
- Side-Angle-Side Postulate
- Angle-Side-Angle Postulate
- Hypotenuse-Side Postulate
- Application of the Properties for Two Figures