1. Similarity of triangles I

2. Similarity of triangles II

3. Similarity of triangles III

4. Similarity of triangles IV

5. BPT and converse of BPT I

6. BPT and converse of BPT II

7. BPT and converse of BPT III

8. Criteria of similarity I

9. Criteria of similarity II

10. Criteria of similarity III

11. Criteria of similarity IV

12. Criteria of similarity V