https://www.khanacademy.org/math/class-9-tg/x06d55bfa213a79fd:quadrilaterals/x06d55bfa213a79fd:properties-of-parallelograms/v/proof-opposite-sides-of-a-parallelogram-indian-accent 2025-06-04T10:04:13.13703146Z Proof: Opposite sides of a parallelogram Sal proves that a figure is a parallelogram if and only if opposite sides are congruent. Kalakrit (Dubbing) video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Proof: Opposite sides of a parallelogram Sal proves that a figure is a parallelogram if and only if opposite sides are congruent. https://cdn.kastatic.org/ka-youtube-converted/gtDZ9hSKSUA.mp4/gtDZ9hSKSUA.mp4 509 Quadrilaterals https://www.khanacademy.org/math/class-9-tg/x06d55bfa213a79fd:quadrilaterals/x06d55bfa213a79fd:properties-of-parallelograms/v/proof-opposite-angles-of-a-parallelogram-indian-accent 2025-06-04T10:04:13.13703146Z Proof: Opposite angles of a parallelogram Sal proves that opposite angles of a parallelogram are congruent. Kalakrit (Dubbing) video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Proof: Opposite angles of a parallelogram Sal proves that opposite angles of a parallelogram are congruent. https://cdn.kastatic.org/ka-youtube-converted/60-kf3Cluvc.mp4/60-kf3Cluvc.mp4 248 Quadrilaterals https://www.khanacademy.org/math/class-9-tg/x06d55bfa213a79fd:quadrilaterals/x06d55bfa213a79fd:properties-of-parallelograms/e/quadrilaterals-10-c 2025-09-03T07:00:55.934529618Z Properties of parallelogram Quadrilaterals ashish exercise https://www.khanacademy.org/districts-courses/geometry-scps-pilot-textbook/x398e4b4a0a333d18:polygons-and-quadrilaterals/x398e4b4a0a333d18:properties-of-parallelograms/e/diagonal-properties-of-quadrilaterals-8th 2026-04-07T22:59:30.107127435Z Side and angle properties of a parallelogram (level 2) Side and angle properties of a parallelogram (level 2) supriya exercise https://www.khanacademy.org/math/class-9-tg/x06d55bfa213a79fd:quadrilaterals/x06d55bfa213a79fd:the-midpoint-theorem/v/midpoint-theorem 2025-05-21T09:59:19.381663781Z Midpoint theorem Dive into the mid-point theorem in this comprehensive video! Understand the theorem which states that the line segment joining the midpoints of two sides of a triangle is parallel to the third side and equal to half its length. Learn its proof step-by-step, supported by clear visuals and reasoning. To reinforce your understanding, tackle a practical example problem and see how the theorem is applied in real scenarios. Perfect for mastering this essential geometry concept! Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now! https://www.khanacademy.org/math/ncert-class-9/x2757d6348a04b24e:quadrilaterals-ncert-new Timestamps: 0:00lntroduction 02:02 Proof of mid-point theorem 06:09 Practice Question 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 MAHAK WASAN Mahak Wasan video https://cdn.kastatic.org/googleusercontent/ZCdwTudJg6e6n-P2gsaUborP4izvMsGo71pvEVlX9dNYWcLXcP7VHkWpn2grt4TUP1KoJLQP9NswyHBuBLSFTBw Midpoint theorem Dive into the mid-point theorem in this comprehensive video! Understand the theorem which states that the line segment joining the midpoints of two sides of a triangle is parallel to the third side and equal to half its length. Learn its proof step-by-step, supported by clear visuals and reasoning. To reinforce your understanding, tackle a practical example problem and see how the theorem is applied in real scenarios. Perfect for mastering this essential geometry concept! Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now! https://www.khanacademy.org/math/ncert-class-9/x2757d6348a04b24e:quadrilaterals-ncert-new Timestamps: 0:00lntroduction 02:02 Proof of mid-point theorem 06:09 Practice Question 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 MAHAK WASAN https://cdn.kastatic.org/ka-youtube-converted/gutMr88XPcE.mp4/gutMr88XPcE.mp4 403 Quadrilaterals https://www.khanacademy.org/math/class-9-tg/x06d55bfa213a79fd:quadrilaterals/x06d55bfa213a79fd:the-midpoint-theorem/e/midpoint-theorem 2026-04-08T00:36:09.500768563Z Midpoint theorem This exercise is curated for new ncert, midpoint theorem lesson in parallelograms and the problems are taken from Quadrilaterals 8.2 Devashish Phadnis exercise