# Right triangles & trigonometry

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Take Quiz 1 to identify your areas for growth. We'll recommend lessons for exactly what you need to learn.

Lessons

Pythagorean theoremPythagorean theorem proofsSpecial right trianglesIntroduction to the trigonometric ratiosQuiz 1Solving for a side in a right triangle using the trigonometric ratiosSolving for an angle in a right triangle using the trigonometric ratiosModeling with right trianglesTrigonometric ratios & similaritySine & cosine of complementary anglesQuiz 2Law of sinesLaw of cosinesSolving general trianglesUnit testLearn

Practice

Use Pythagorean theorem to find right triangle side lengths

7 questions

Practice

Use Pythagorean theorem to find isosceles triangle side lengths

7 questions

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Pythagorean theorem challenge

4 questions

Practice

Learn

Practice

Special right triangles

7 questions

Practice

Quiz 1

Identify your areas for growth in these lessons:

Practice

General triangle word problems

4 questions

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Unit test

Test your understanding of

**Right triangles & trigonometry**with these 11 questions.About Right triangles & trigonometry

Triangles are not always right (although they are never wrong), but when they are it opens up an exciting world of possibilities. Not only are right triangles cool in their own right (pun intended), they are the basis of very important ideas in analytic geometry (the distance between two points in space) and trigonometry.