(1) What is similarity?; (2) Different criteria of similarity of two Triangles; (3) A-A-A (Angle-Angle-Angle) criterion of similarity of two triangles; (4) S-S-S (Side- Side – Side) criterion of similarity of two train; (5) S-A-S (Side- Angle – Side) criterion of similarity of two triangles; (6) Best way to solve questions related to similarity; (7) Theorems related to the similarity of triangles; (8) The ratio of the areas of two similar triangles is equal to the square of the ratio of their corresponding sides; (9) The ratio of the perimeters of two similar triangles is equal to the ratio of their corresponding sides
