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  2. Khan Academy

    www.khanacademy.org/math/trigonometry/trigonometry-right-triangles

    Learn about the properties and applications of right triangles and trigonometry with Khan Academy's comprehensive unit.

  3. Unit 5: Right triangles & trigonometry - Khan Academy

    www.khanacademy.org/math/geometry/hs-geo-trig

    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.

  4. Khan Academy

    www.khanacademy.org/math/geometry-home/right-triangles-topic

    Explore. Our mission is to provide a free, world-class education to anyone, anywhere. Khan Academy is a 501 (c) (3) nonprofit organization. Donate or volunteer today! About. News.

  5. Hypotenuse, opposite, and adjacent (article) | Khan Academy

    www.khanacademy.org/math/geometry/hs-geo-trig/xff63fac4:hs-geo-trig-ratios...

    In a right triangle, the hypotenuse is the longest side, an "opposite" side is the one across from a given angle, and an "adjacent" side is next to a given angle.

  6. Right triangle trigonometry | Lesson (article) | Khan Academy

    www.khanacademy.org/.../a/v2-sat-lesson-right-triangle-trigonometry

    A guide to right triangle trigonometry on the digital SAT Skip to main content If you're seeing this message, it means we're having trouble loading external resources on our website.

  7. Khan Academy

    www.khanacademy.org/math/geometry/hs-geo-trig/hs-geo-special-right-triangles/a/...

    Khan Academy. If you're seeing this message, it means we're having trouble loading external resources on our website. If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked. Explore. Search. Donate. Log in Sign up.

  8. Classifying triangles (video) | Khan Academy

    www.khanacademy.org/.../v/scalene-isosceles-equilateral-acute-right-obtuse

    If you're seeing this message, it means we're having trouble loading external resources on our website. If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

  9. Solving for a side in right triangles with trigonometry (video) |...

    www.khanacademy.org/math/geometry/hs-geo-trig/hs-geo-solve-for-a-side/v/...

    Sal is given a right triangle with an acute angle of 65° and a leg of 5 units, and he uses trigonometry to find the two missing sides.

  10. Angles of a triangle (review) | Geometry (article) | Khan Academy

    www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-geometry/cc-8th-triangle...

    Review the basics of triangle angles, and then try some practice problems. Skip to main content If you're seeing this message, it means we're having trouble loading external resources on our website.

  11. Khan Academy

    www.khanacademy.org/math/geometry-home/geometry-pythagorean-theorem

    Explore. Our mission is to provide a free, world-class education to anyone, anywhere. Khan Academy is a 501 (c) (3) nonprofit organization. Donate or volunteer today! About. News. Impact. Our team. Our interns.