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Sections

Triangles

Pick a section. You read the idea first, then answer questions on it.

1. Same shape, any size1 ideaRead
2. Before you start1 ideaRead
3. Similar figures, defined1 ideaRead
4. Congruent triangles, defined1 ideaRead
5. Similarity, applied to triangles1 ideaRead
6. Examples and counterexamples1 ideaRead
7. SSS congruence, reviewed1 ideaRead
8. SAS congruence, reviewed1 ideaRead
9. ASA congruence, reviewed1 ideaRead
10. RHS congruence, reviewed1 ideaRead
11. The Basic Proportionality Theorem1 ideaRead
12. Converse of the Basic Proportionality Theorem1 ideaRead
13. The AA similarity criterion1 ideaRead
14. The SSS similarity criterion1 ideaRead
15. The SAS similarity criterion1 ideaRead
16. Similar is not congruent1 ideaRead
17. Part against part, not part against whole1 ideaRead
18. Worked: using the ratio theorem1 ideaRead
19. Worked: checking for parallel lines1 ideaRead
20. Worked: a shadow and a lamp-post1 ideaRead
21. Worked: SSS finds a missing angle1 ideaRead
22. Worked: vertical angles and SAS1 ideaRead
23. Worked: similar, then congruent1 ideaRead
24. Recap1 ideaRead
25. Where you will meet this1 ideaRead
26. Practice set: Exercise 6.11 ideaRead
27. Practice set: Exercise 6.21 ideaRead
28. Practice set: Exercise 6.31 ideaRead