Triangles, Congruence and Similarity

Angle Bisector Theorem and Triangle Problems

Triangle Area Formulas

Triangles: Classification, Special Triangles and Angle Sum

Medians, Centroid and Special Lines and Points of a Triangle

Thales’ Theorem and Thales Circle

Congruent Triangles: SSS, SAS, ASA, AAS and HL

Similar Triangles and Proportionality Theorems