https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-geometry/cc-8th-pythagorean-theorem/v/the-pythagorean-theorem 2023-05-23T10:21:00.469536483Z Intro to the Pythagorean theorem The Pythagorean theorem is a cornerstone of math that helps us find the missing side length of a right triangle. In a right triangle with sides A, B, and hypotenuse C, the theorem states that A² + B² = C². The hypotenuse is the longest side, opposite the right angle. Sal Khan video https://cdn.kastatic.org/googleusercontent/zm9lxg5aZkInLh29lDFE0ccgsSaxlQuzX0ogkP6IbAwcTeapeXzOpPLaFNmpA6WAoS_PhTCuQDrDMou_Wqr5Y4nf Intro to the Pythagorean theorem The Pythagorean theorem is a cornerstone of math that helps us find the missing side length of a right triangle. In a right triangle with sides A, B, and hypotenuse C, the theorem states that A² + B² = C². The hypotenuse is the longest side, opposite the right angle. https://cdn.kastatic.org/ka-youtube-converted/AA6RfgP-AHU.mp4/AA6RfgP-AHU.mp4 646 Pythagoras Theorem https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-geometry/cc-8th-pythagorean-theorem/e/pythagorean_theorem_1 2026-03-10T06:50:36.944772689Z Use Pythagorean theorem to find right triangle side lengths Find the length of the hypotenuse or a leg of a right triangle using the Pythagorean theorem.   Ben Alpert exercise https://www.khanacademy.org/math/geometry/hs-geo-trig/hs-geo-pyth-theorem/v/pythagorean-theorem-with-right-triangle 2023-05-09T21:01:11.605979523Z Pythagorean theorem with isosceles triangle To find the value of a base (x) in an isosceles triangle, first split the triangle into two congruent right triangles by drawing an altitude. Then, use the Pythagorean theorem to create an equation involving x. Finally, solve the equation to find the unknown base, x. video https://cdn.kastatic.org/ka_thumbnails_cache/2c9f7c97-d91f-44cf-aca5-8f76cf54b1f8_1280_720_base.png Pythagorean theorem with isosceles triangle To find the value of a base (x) in an isosceles triangle, first split the triangle into two congruent right triangles by drawing an altitude. Then, use the Pythagorean theorem to create an equation involving x. Finally, solve the equation to find the unknown base, x. https://cdn.kastatic.org/ka-youtube-converted/TjOlZr_2uW4.mp4/TjOlZr_2uW4.mp4 228 Pythagoras Theorem https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-geometry/cc-8th-pythagorean-theorem/e/use-pythagorean-theorem-to-find-side-lengths-on-isosceles-triangles 2026-05-04T16:10:46.51963925Z Use Pythagorean theorem to find isosceles triangle side lengths Find a missing side length on an acute isosceles triangle by using the Pythagorean theorem. Lindsay exercise https://www.khanacademy.org/math/ka-math-class-8-ncf/x5c620ccbb96453eb:the-baudhayana-pythagoras-theorem/x5c620ccbb96453eb:pythagoras-theorem/v/converse-of-pythagoras-theorem 2025-10-06T14:00:44.591197305Z Converse of Pythagoras Theorem "In this video, we walk through a clear, step-by-step proof of the Converse of the Pythagorean Theorem. Starting with a triangle whose side lengths satisfy the condition a^2 + b^2 = c^2, we construct and reason our way to show that the triangle must be right-angled. The proof is scaffolded with visual cues and logical clarity, making each step intuitive and accessible. Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now!Unit link 00:00 Recalling Pythagoras 00:39 Proof of Converse of Pythagoras Theorem Khan Academy India is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We have videos and exercises that have been translated into multiple Indian languages, and 15 million people around the globe learn on Khan Academy every month. Support Us: https://india.khanacademy.org/donate Created by Khan Academy Khan Academy video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Converse of Pythagoras Theorem "In this video, we walk through a clear, step-by-step proof of the Converse of the Pythagorean Theorem. Starting with a triangle whose side lengths satisfy the condition a^2 + b^2 = c^2, we construct and reason our way to show that the triangle must be right-angled. The proof is scaffolded with visual cues and logical clarity, making each step intuitive and accessible. Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now!Unit link 00:00 Recalling Pythagoras 00:39 Proof of Converse of Pythagoras Theorem Khan Academy India is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We have videos and exercises that have been translated into multiple Indian languages, and 15 million people around the globe learn on Khan Academy every month. Support Us: https://india.khanacademy.org/donate Created by Khan Academy https://cdn.kastatic.org/ka-youtube-converted/9tXHcAbiNuI.mp4/9tXHcAbiNuI.mp4 261 Pythagoras Theorem https://www.khanacademy.org/math/cc-eighth-grade-math/cc-8th-geometry/cc-8th-pythagorean-theorem/e/right-triangle-side-lengths 2025-12-29T14:34:21.667121593Z Right triangle side lengths Use the Pythagorean theorem to determine if the given side lengths could form a right triangle. Lindsay exercise