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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: carpetIntroduction to the Pythagorean theoremPythagorean theorem II
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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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Hypotenuse, opposite, and adjacentIntro to the trigonometric ratiosTrigonometric ratios in right trianglesTrigonometric 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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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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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!

About this unit

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.