# Right triangles & trigonometry

## Pythagorean theorem

Learn
Intro to the Pythagorean theoremIntro to the Pythagorean theorem 2Pythagorean theorem word problem: fishing boatPythagorean theorem examplePythagorean theorem word problem: carpetPythagorean theorem with isosceles triangleIntroduction to the Pythagorean theoremPythagorean theorem II
Practice
Pythagorean theorem challengeGet 3 of 4 questions to level up!

## Pythagorean theorem proofs

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Garfield's proof of the Pythagorean theoremBhaskara's proof of the Pythagorean theoremPythagorean theorem proof using similarityAnother Pythagorean theorem proof

## Special right triangles

Learn
Special right triangles intro (part 1)Special right triangles intro (part 2)30-60-90 triangle example problemSpecial right triangles proof (part 1)Special right triangles proof (part 2)Area of a regular hexagonSpecial right triangles review
Practice
Special right trianglesGet 5 of 7 questions to level up!

## Introduction to the trigonometric ratios

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Intro to the trigonometric ratiosTrigonometric ratios in right trianglesHypotenuse, opposite, and adjacentTrigonometric ratios in right triangles
Practice
Trigonometric ratios in right trianglesGet 3 of 4 questions to level up!

## Solving for a side in a right triangle using the trigonometric ratios

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Solving for a side in right triangles with trigonometrySolving for a side in right triangles with trigonometry
Practice
Solve for a side in right trianglesGet 3 of 4 questions to level up!

## Solving for an angle in a right triangle using the trigonometric ratios

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Intro to inverse trig functions
Practice
Solve for an angle in right trianglesGet 3 of 4 questions to level up!

## Modeling with right triangles

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Right triangle word problemAngles of elevation and depressionRight triangle trigonometry review
Practice
Right triangle word problemsGet 3 of 4 questions to level up!

## Trigonometric ratios & similarity

Learn
Triangle similarity & the trigonometric ratiosTrig challenge problem: verify identitiesTrig challenge problem: trig values & side ratios

## Sine & cosine of complementary angles

Learn
Sine & cosine of complementary anglesUsing complementary anglesTrig word problem: complementary angles

## Law of sines

Learn
Solving for a side with the law of sinesSolving for an angle with the law of sinesProof of the law of sines
Practice
Solve triangles using the law of sinesGet 3 of 4 questions to level up!

## Law of cosines

Learn
Solving for a side with the law of cosinesSolving for an angle with the law of cosinesProof of the law of cosines
Practice
Solve triangles using the law of cosinesGet 3 of 4 questions to level up!

## Solving general triangles

Learn
Trig word problem: starsLaws of sines and cosines review
Practice
General triangle word problemsGet 3 of 4 questions to level up!