- Directed Angles
- Smallest Positive Equivalent Angle
- Coterminal Angles
- Similar Triangles
- Angle–Angle (AA) Similarity Criterion
- Side-Side-Side (SSS) Similarity Criterion
- Similar Polygons
- Areas of Similar Polygons given a Scale Factor
- Area Ratio of Similar Polygons
- Relation between The Roots L and M
- L + M ( The Sum )
- LM ( The Product )
- The Intersecting Chords Theorem
- Intersecting Secants Theorem
- The Tangent–Secant Theorem
- Relation Between The Roots
- Forming The Quadratic
- Sign of a Function
- Sign of a constant, Linear and Quadratic Functions