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# Right triangles & trigonometry

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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

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Use Pythagorean theorem to find right triangle side lengthsGet 5 of 7 questions to level up!

Use Pythagorean theorem to find isosceles triangle side lengthsGet 5 of 7 questions to level up!

Pythagorean theorem challengeGet 3 of 4 questions to level up!

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

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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

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Special right trianglesGet 5 of 7 questions to level up!

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Intro to the trigonometric ratiosTrigonometric ratios in right trianglesHypotenuse, opposite, and adjacentTrigonometric ratios in right triangles

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Trigonometric ratios in right trianglesGet 3 of 4 questions to level up!

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Solving for a side in right triangles with trigonometrySolving for a side in right triangles with trigonometry

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Solve for a side in right trianglesGet 3 of 4 questions to level up!

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Intro to inverse trig functions

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Solve for an angle in right trianglesGet 3 of 4 questions to level up!

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Right triangle word problemAngles of elevation and depressionRight triangle trigonometry review

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Right triangle word problemsGet 3 of 4 questions to level up!

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

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

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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!

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Solving for a side with the law of cosinesSolving for an angle with the law of cosinesProof of the law of cosines

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Solve triangles using the law of cosinesGet 3 of 4 questions to level up!

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Trig word problem: starsLaws of sines and cosines review

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General triangle word problemsGet 3 of 4 questions to level up!