Similarity & Right Triangle Trigonometry

Extra help/practice

Similar Triangles

Shortcuts in determining triangle similarity

Shortcuts in determining triangle similarity (Khan Academy video)

Examples of Pythagorean Theorem problems

Textbook lesson and practice: Converse of the Pythagorean Theorem

Video lesson on 45-45-90 (isosceles right) triangles

Video lesson on 30-60-90 triangles

Extra practice worksheet with answer key: special right triangles

Lesson on SOHCAHTOA basics + practice problems

Follow-up lesson on SOHCAHTOA basics

Video on proving triangles similar in a flow proof

Video on proving triangles similar in a two-column proof

Lesson: Using CASTC (or "definition of similarity") in proofs

Textbook lesson on similar triangle proofs